For the tech gurus out there...Any feedback would be greatly appreciated!!!! I'm stumped.

1) Friday Night - Installed Steeda cold air kit with plastic inlet tube. Re-tuned with SCT with 93 octane setting and Steeda kit programming. Test Drove...awesome.

2) Saturday - Drove 4 hours and seemed fine.

3) Sunday - Stayed parked all day.

4) Monday - Drove home 3 hours - halfway put in a can of Seafoam Motor Treatment -FROM THAT POINT ON IN HESITATES BIG TIME IN LOWER RPM RANGE. But...doesn't do it every time.

Note: Car has 81,000 miles - synthetic since 2k. Only other mods - underdrive pulleys and Steeda throttle body spacer.

Thoughts?

Thanks, Kevin

Sea foam and hesitation are most likely not related.

I would start with checking/cleaning Mass Air Meter and associated connections with change of CAI

Before I installed my Steeda, I used some sandpaper on the shiny black elbow so that the rubber connectors would stick better. This included the vacuum hose fitting. Check to be sure that it did not come loose from driving.

Thanks angcobra...are spark plugs a possibility that suddenly and coincidentally with the high miles (81,000)?
Kevin

So...is what I'm describing a classic symptom of air getting into a connection somewhere between the throttle body and air filter?

ORIGINAL: wasvette

Thanks angcobra...are spark plugs a possibility that suddenly and coincidentally with the high miles (81,000)?
Kevin

plugs would effect all rpm ranges

ORIGINAL: wasvette

So...is what I'm describing a classic symptom of air getting into a connection somewhere between the throttle body and air filter?

With change of the CAI, it is a strong possibility.
Anytime you make a mod or work on something and then a problem shows up, always go back and look at the last thing worked on first.

Makes sense angcobra...I just can't figure out what changed between Saturday and Monday even after a detailed inspection of the CAI...just a bummer after spending almost $700 and pulling off a no tune CAI that was working fine...

"Half Power" Kevin

Is your new filter, an oil type filter? If so, it maybe that some of the excess oil is now on the Mass air meter, confusing things.

It's a steeda filter...I think it uses oil...how do you clean a mass air without ruining it?

ORIGINAL: wasvette

It's a steeda filter...I think it uses oil...how do you clean a mass air without ruining it?

Use anaerosolcan of quick drying electronic cleaner.

ok, one thing that has not been mentioned yet....

fuel pump TSB - hesitation after cruise....


ORIGINAL: wasvette

For the tech gurus out there...Any feedback would be greatly appreciated!!!! I'm stumped.

1) Friday Night - Installed Steeda cold air kit with plastic inlet tube. Re-tuned with SCT with 93 octane setting and Steeda kit programming. Test Drove...awesome.

2) Saturday - Drove 4 hours and seemed fine.

3) Sunday - Stayed parked all day.

4) Monday - Drove home 3 hours - halfway put in a can of Seafoam Motor Treatment -FROM THAT POINT ON IN HESITATES BIG TIME IN LOWER RPM RANGE. But...doesn't do it every time.

Note: Car has 81,000 miles - synthetic since 2k. Only other mods - underdrive pulleys and Steeda throttle body spacer.

Thoughts?

Thanks, Kevin

ORIGINAL: hammeron

ok, one thing that has not been mentioned yet....

fuel pump TSB - hesitation after cruise....


ORIGINAL: wasvette

For the tech gurus out there...Any feedback would be greatly appreciated!!!! I'm stumped.

1) Friday Night - Installed Steeda cold air kit with plastic inlet tube. Re-tuned with SCT with 93 octane setting and Steeda kit programming. Test Drove...awesome.

2) Saturday - Drove 4 hours and seemed fine.

3) Sunday - Stayed parked all day.

4) Monday - Drove home 3 hours - halfway put in a can of Seafoam Motor Treatment -FROM THAT POINT ON IN HESITATES BIG TIME IN LOWER RPM RANGE. But...doesn't do it every time.

Note: Car has 81,000 miles - synthetic since 2k. Only other mods - underdrive pulleys and Steeda throttle body spacer.

Thoughts?

Thanks, Kevin



+1 that is my first thought also....and get rid of the TB spacer...it does nothing is a freaking paper wieght!!!

Hammeron and Howarmat and ALL- Drove about 300 miles for work today...ran great on the interstate...3rd gear punches at 65, etc. Now it runs like crap in the city tonight- from 1800 rpm on up...Punch it in any gear and it feels like the brakes got slammed on...I've heard of the fuel pump tsb...would this be much worse now with this mod? Any chance the issue is the Steeda tune? I've checked all connections and there is no way any air is leaking. Is there ANY chance this is symptamatic of spark plugs?

This is really, really aggravating me. The car is almost not driveable except at low rpm and very steady acceleration. I was expecting a complete Steeda CAI w/ their tune to be awesome but so far it has been a nightmare and a lot of work trying to figure out why I now have less power than stock. I know their products are good but it doesn't make me feel any better after dropping the cash.
Thanks for the Input,
Kevin

you know what......you might consider
returning your car to stock, just to
regain a good working reference.

it'll just be a saturday morning project and
then you can get a better idea of what may be
happening.....just an idea

hammeron - You can tell I'm too emotionally involved at this point because that is a pretty good idea and I didn't even remotely think of doing that. I'm also in communication with one of the guys at STEEDA for ideas as I bought directly from them.
Thanks,
Kevin
06 Hyundai Mustang GT

For those tracking and contributing to this thread, the verdict appears to be fuel pump (will know 100% when replaced). CAI and TUNE make the car run like a bat out of hell in the morning when first driving begins...after some steady speed high way cruising is when the problems begin.

Thanks to all for the input!
Kevin
06 Black GT

That can happen at higher rpms as well.

ORIGINAL: hammeron

ok, one thing that has not been mentioned yet....

fuel pump TSB - hesitation after cruise....


ORIGINAL: wasvette

For the tech gurus out there...Any feedback would be greatly appreciated!!!! I'm stumped.

1) Friday Night - Installed Steeda cold air kit with plastic inlet tube. Re-tuned with SCT with 93 octane setting and Steeda kit programming. Test Drove...awesome.

2) Saturday - Drove 4 hours and seemed fine.

3) Sunday - Stayed parked all day.

4) Monday - Drove home 3 hours - halfway put in a can of Seafoam Motor Treatment -FROM THAT POINT ON IN HESITATES BIG TIME IN LOWER RPM RANGE. But...doesn't do it every time.

Note: Car has 81,000 miles - synthetic since 2k. Only other mods - underdrive pulleys and Steeda throttle body spacer.

Thoughts?

Thanks, Kevin

Well your problem could be the fuel pump, but it's not related to the TSB. The hesitation problem with the fuel pump only happens after driving for a few miles at highway speeds and then slowing down and trying to accelerate quickly. It's not going to happen just driving around town.
ORIGINAL: wasvette

For those tracking and contributing to this thread, the verdict appears to be fuel pump (will know 100% when replaced). CAI and TUNE make the car run like a bat out of hell in the morning when first driving begins...after some steady speed high way cruising is when the problems begin.

Thanks to all for the input!
Kevin
06 Black GT

Seafoam really cleans things up including spark plugs;)It may have cleaned them up good enough that it's time to replace them. My work truck recently had a slight miss at 1800-2000 rpms and once I past that it was smooth as can be....go figure, did a tune up now she runs like a champ. Also I would return her back to stock to see how she runs afterwards becuase plugs for these car's are 15 bucks a piece and that would be an exspensive guess[&:]

ORIGINAL: angcobra

Sea foam and hesitation are most likely not related.

I would start with checking/cleaning Mass Air Meter and associated connections with change of CAI


After reading some of the other posts, I may have mis-spoke on this, I assumed youused additiveto engine oil, but instead you may have been talking about adding to fuel. Sorry I might have been on the wrong page.
If you added it to the fuel, it most likely is related. Any concentrated cleaner added to fuel could cause partial clogging of injectors which will impact the spray pattern thus impacting performance.

ORIGINAL: angcobra

ORIGINAL: angcobra

Sea foam and hesitation are most likely not related.

I would start with checking/cleaning Mass Air Meter and associated connections with change of CAI


After reading some of the other posts, I may have mis-spoke on this, I assumed youused additiveto engine oil, but instead you may have been talking about adding to fuel. Sorry I might have been on the wrong page.
If you added it to the fuel, it most likely is related. Any concentrated cleaner added to fuel could cause partial clogging of injectors which will impact the spray pattern thus impacting performance.



I'm getting more confused with this by the day but I do really appreciate everyone's input.

After driving for a few days, here's what I know for sure:
Hesitation is almost random - when it happens, the car falls on its face between literally 1800 RPMs and 3000 RPMs.
Runs perfectly 1st thing in the morning and for an hour or so - I can get on the interstate after the car has been running for 5 - 10 minutes and it screams with 0 issues.
Worst hesitation occurs after parking for a sales call and then coming out 20 - 30 minutes later. Seems like a "heat" related problem -are fuel pump issues sensitive to heat?
It has 81,000 miles - should the spark plugs be replaced anyway due to mileage?
There is a TSB on the fuel pump and I used to have the classic issue described after cruising - so should this not be replaced anyway?
Could some of the causes of my problem been there the whole time but now be pronounced due to the extra fuel/spark demands of the Steeda CAI and SCT 93 Tune.
Would returning it to stock definitively prove anything if the problem is what I said in the previous bullet point?
Final Point - I have never spent so much time trying to get a $700 mod to actually work as intended.
Thanks!
Kevin

1) Shouldnt take long to return to stock to see of that is indeed the problem. If it is you will stop seeing the hesitation, if its not you wont.

2) If theres a TSB and you havnt had it done I would get the fuel pump taken care of and go from there.

Do those 2 things first and you'll be ahead of the game, your out of warranty so I guess that wont help but I dont believe it's your spark plugs otherwise you'd see the issue be more consistent I would think.

No sh!t!! that's some BS IMHO. Did your miss in your work truck cause a vibration? I have a vibration at 3200, most noticeable in 3rd and 4th. I was going to try and buy 1 spark plug and injector froma FI guy on here. That way i could swap them out 1 at a time and see if it solves my problem.

ORIGINAL: 05 Ricky

plugs for these car's are 15 bucks a piece and that would be an exspensive guess[&:]

ORIGINAL: wasvette
It has 81,000 miles - should the spark plugs be replaced anyway due to mileage?


81k on stock plugs? I would change those for sure. At the very least I would pull them and check them.

recommendations:

1) return car to stock airbox and tune

(*)
did this correct problem
yes > all is well
no > proceed to next step

2) clean or replace fuel filter

*

3)
clean fuel injectors (i don't know how this is done)

*


4) remove spark plugs, clean if possible, check gap, reinstall

*

-------------------------------------------------------------
that's as far as i can take you, the dealership may be the next
option.


good luck and everything's gonna be fine

ORIGINAL: moosestang

No sh!t!! that's some BS IMHO. Did your miss in your work truck cause a vibration? I have a vibration at 3200, most noticeable in 3rd and 4th. I was going to try and buy 1 spark plug and injector froma FI guy on here. That way i could swap them out 1 at a time and see if it solves my problem.

ORIGINAL: 05 Ricky

plugs for these car's are 15 bucks a piece and that would be an exspensive guess[&:]

Yes it caused a vibration and a studder and once I was at higher rpms it cleaned up[&:]Vibrations can be cuased by way to many things[8D]

I truly appreciate everyone's blood, sweat, and tears on this one.

UPDATE: Absolutely HEAT related, period. As long as the car is moving and air is flowing through the engine compartment and enhancing the cooling effect ALL is good....Stop and park for 10 minutes and let the heat soak begin. Not sure what's "heating up" but something changes. Drive for 5 minutes over 50 mph and all is good again.
Ditched the throttle body spacer tonight just to simplify what's going on. Re-tuned with lower fan turn on temps. Drove and ran liked a scalded dog. Didn't park and turn off and then run again...will see tomorrow.

Regardless, will swap all plugs and fuel pump. However I believe the CAI (and install of) and Tune is fine.

Thanks Guys!
Kevin

For those that were following this thread.......the fuel pumphas beenswapped under warranty by a dealer here in Atlanta......problem still exists, though not as bad. IT ONLY HESITATES UNDER MODERATE TO HARD ACCELERATION WHEN IT HAS SAT PARKED FOR A FEW MINUTES AFTER DRIVING....HEAT SOAK....LET IT RETURN TO NORMAL TEMP WHILE DRIVING AND IT RUNS PERFECTLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

.....WHAT IS HEATING UP? IS THE MILLION DOLLAR QUESTION....DID NOT DO THIS PRE-CAI AND TUNE...

DUMBFOUNDED IN GEORGIA.....

Did you ever remove the CAI and tune? Common sense would tell you that's the problem if the problem started right afterwards.

ORIGINAL: wasvette

For those that were following this thread.......the fuel pumphas beenswapped under warranty by a dealer here in Atlanta......problem still exists, though not as bad. IT ONLY HESITATES UNDER MODERATE TO HARD ACCELERATION WHEN IT HAS SAT PARKED FOR A FEW MINUTES AFTER DRIVING....HEAT SOAK....LET IT RETURN TO NORMAL TEMP WHILE DRIVING AND IT RUNS PERFECTLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

.....WHAT IS HEATING UP? IS THE MILLION DOLLAR QUESTION....DID NOT DO THIS PRE-CAI AND TUNE...

DUMBFOUNDED IN GEORGIA.....

Moosestang - Thanks for the reality check. I really don't want to F with that but it looks like I'll be doing it anyway. I just don't understand why it runs PERFECTLY until it's parked for a minute.
Thanks!!!

I don't know, but tunes can be funny things. If you do put the stock tune back in and it runs perfectly fine then my suggestion is to get a tune from brenspeed.com or B@m@chips.com for the steeda intake. That way if there's a problem related to the tune they can work with you to fix it.



ORIGINAL: wasvette

Moosestang - Thanks for the reality check. I really don't want to F with that but it looks like I'll be doing it anyway. I just don't understand why it runs PERFECTLY until it's parked for a minute.
Thanks!!!

Seafoam, lol. 80k miles NO problems, use Seafoam & problems, but it cant be the Seafoam, right?
Soooo many people have problems after useing that crap but insist that its not the Seafoam that did it. LOL

FrostByte - I'm not saying it's not the SEAFOAM...that's why I asked originally. Do you have anything to support what you're saying? I just want this BS done with.

It just seems that alot of people have NO problems w/ it but there are alot that have problems like yours after useing it. I have read too many threads like this one. Iwouldnt use itmyself, if I thought I had to I would only add it in the gas tank.

I did only put it in the gas tank. Would NEVER put anything like that in the oil!

Take the fuel rails off the injectors. I bet one or two is clogged. All that crap the Seafoam loosens up has to go some where. Change your fuel filter also.

It appears beside having a vehicle with some miles on it you have two unknown variables (what everyone has pointed out) the CAI and tune and the Seafoam. Lets face it the problem started after these two events. I think you need to start removing variables as everyone also said. if you remove the CAI and tune and still have the problem then it is not that variable, in which case you can look at the Seafoam. I think the only reason everyone is suggecting attacking it from the point of the CAI is because it's the simplest. If not the CAI then it is most probably the Seafoam in which case pulling the rails and such will probably be in order.

In other words start with the CAI and hope that's what it is, because the alternative could be quite a bit more involved.

Wow, I think I just repeated what you said Hammeron. However, I think you said it much simpler!

ORIGINAL: wasvette

I truly appreciate everyone's blood, sweat, and tears on this one.

UPDATE: Absolutely HEAT related, period. As long as the car is moving and air is flowing through the engine compartment and enhancing the cooling effect ALL is good....Stop and park for 10 minutes and let the heat soak begin. Not sure what's "heating up" but something changes. Drive for 5 minutes over 50 mph and all is good again.
Ditched the throttle body spacer tonight just to simplify what's going on. Re-tuned with lower fan turn on temps. Drove and ran liked a scalded dog. Didn't park and turn off and then run again...will see tomorrow.

Regardless, will swap all plugs and fuel pump. However I believe the CAI (and install of) and Tune is fine.

Thanks Guys!
Kevin


Did you check your temperature gauge when this problem occurs? Is the car running hot? Are you sure the low speed / high speed fan settings set properly on the tune you have installed? What are they set at?

Italian tune up time :)

And daft question but did you install the heat guard with the CAI? Its rather obvious but half the time the most obvious thing is the answer.

Ok I will take a stab at this. Did you install the MAS tube in the right direction? They can be installed backwards. You are saying heat related. Did you look at the small sensor wires in the MAS tube? I am not sure about the 05-07 MAS, but the older MAS had a heated wire that was powered when the car was in a open loop condition. Open loop is when the engine is not up to operation conditions. I hope I have those loop conditions right, it's been a long time since I had to mees with the MAS. Hope this might help, just a shot in the dark.

EDIT. After reading a bit more, the 05-07 MAS tube does have a heated wire. It is heated all the time to allow a reference temp so it can detect how much air is coming through the tube. The more air coming through, the lower the temp of the wire gets.

Return back to stock set up!!!!!!Damn it takes like 20 mins 30 tops, you have spent more time in here after getting that advice. Go to last known "good configuration" if problem is still there return to this forum and post. At that point the fine folks here will have a better idea of how to help you. Too many variables right now, high milage, new intake and tune, additives,outstanding TSB ect ect.......I aint trying to be mean just take the advice that has been given to you.

TSB = Technical Service Bulliten? if not, what is it?

All right, put the wet noodles away. Returning to stock box and tune today.
Also, to address other feedback:
> Fuel filter is one week old
> Fuel pump is new
> Plugs old - dealer wouldn't do for fear of breaking - this doesn't sound plausible anyway
> Engine Temp is fine - fans are on - that's why the problem only happens after parking for 10 minutes or so with the engine/fans OFF
> Heat shield is installed
> MAF sensor direction is correct

WILL REPORT BACK AFTER RETURNING TO STOCK AND TESTING.

ORIGINAL: sharkbait20

TSB = Technical Service Bulliten? if not, what is it?


That is correct;)

Update 7-7-07:

For everyone that busted my ba!!$ to return everything to stock, it appears you were correct. Pulled the Steeda complete CAI and removed the Steeda SCT 93 tune. Drove hard for 20 minutes to get real hot. Parked for almost 10 minutes off. Drove out and it ran perfectly. Repeated, ran perfectly. This is when it would have hesitated between 1800 RPM and 3000 RPM.

OK, now what? The MAF sensor is the same one in both scenarios, so it can be ruled out.
Is it something with the brand new Steeda CAI or the SCT Steeda tune?? This has been the biggest pain in the a$$.

Thanks for all the feedback!

You can also try Steeda tech support about thier cai and tune. One theory would be that after sitting your cai is sucking in extremely hot air from the engine bay initially kinda far fetched but Ive seen stranger things happen. After that I would call brenspeed and get a tune from him, Brent is quite helpful.

ORIGINAL: Mikes_BLK_GT

You can also try Steeda tech support about thier cai and tune. One theory would be that after sitting your cai is sucking in extremely hot air from the engine bay initially kinda far fetched but Ive seen stranger things happen. After that I would call brenspeed and get a tune from him, Brent is quite helpful.


Mike - Thanks for the input. I've been working with one of the guys at Steeda and just wrote him a "War & Peace" length email update (about going to stock). I'm not a mechanic (obviously) but I have been thinking the same thing about the heat. Runs great cold, runs great when you've been moving, runs terrible for 4-5 minutes after you've been parked with the engine OFF.
Everyone's been screaming about common sense...this looks like some to me.

Regardless, I just want a stupid intake and tune that works. Has no one else on the forum had a problem even remotely similar to this?

Did your CAI come with the plastic shield for the air filter...personally after reading all this I am questioning the tune. A tune makes all the dif in the world and canned tunes are univeral but may not work in all areas...what is your altitude where your at...can you imagine if the tune is designed for sea level and your living in denver at 8280 ft altiitude...world of dif.

ORIGINAL: hotairgypsy

Did your CAI come with the plastic shield for the air filter...personally after reading all this I am questioning the tune. A tune makes all the dif in the world and canned tunes are univeral but may not work in all areas...what is your altitude where your at...can you imagine if the tune is designed for sea level and your living in denver at 8280 ft altiitude...world of dif.


hotairgypsy - I like the fact that everyone is thinking. I see your logic...however Ford ships every car with a universal factory tune (I think) and Steeda knows my shipping address and didn't ask me what state I'd be driving the car in. I wish it was this simple.

I'd be interested in hearing what steeda had to say. Like I said earlier maybe talk to Brent and see if he has any ideas. Heat does seem to be the one constant with your troubles.

ORIGINAL: Mikes_BLK_GT

I'd be interested in hearing what steeda had to say. Like I said earlier maybe talk to Brent and see if he has any ideas. Heat does seem to be the one constant with your troubles.


Mikes_BLK_GT (http://www.mustangforums.com/showProfile.asp?memid=69454) I'll let you know Monday when my Steeda guy is back in the office......

but i bet money steeda does not have tunes based on towns...it is probably the same thru out the usa...well if we just look a the logic there are three parts here...the K&N style filter(I assume), the plumming, the installation of the MAF sensor for the hardware and the tune for the software. If the air filter is coated with oil as it should be when they come new that should be flowing properly. The plumming is a no brainer so we are down to two issues...Is there issues with the MAF like backwards, reading improperly(but it works properly when back to factory config), or damage too it. Your based out of atlanta as per your name info so if memory serves me correctly that is about 1500 ft...I would not see the altitude being a issue.

since it is back at factory config what are the temp reading are you getting or do you just have a temp light?

one thing that keeps lingering in the back of my head is also spark plug...When rode my MCs if I got a fouled plug it would be herky jerky and would feel like the brakes were on...On a MC there are 2 or 4 plugs depending on vtwin or inline so when it happens it is more obvious. It only takes one to give you grief...what sucks about plugs, at least in my experience, when they are fouled you might as well replace. I have tried everything to UN-foul them and I have never been successful.did you change out the fuel filter before or after you started having the issue...did the issue start right after the swap out?

ORIGINAL: hotairgypsy

one thing that keeps lingering in the back of my head is also spark plug...When rode my MCs if I got a fouled plug it would be herky jerky and would feel like the brakes were on...On a MC there are 2 or 4 plugs depending on vtwin or inline so when it happens it is more obvious. It only takes one to give you grief...what sucks about plugs, at least in my experience, when they are fouled you might as well replace. I have tried everything to UN-foul them and I have never been successful.did you change out the fuel filter before or after you started having the issue...did the issue start right after the swap out?


hotairgypsy (http://www.mustangforums.com/showProfile.asp?memid=59163) The car runs perfectly when I put the stock tune and airbox in....so I'm thinking the plugs are OK even though they have a lot of miles....if it performed badly all the time I would think spark plugs were a possibility....does this make sense?

titleAndStar(193,0,0,false,",")

So with all the cold air kits w/tune installed on this forum, no one else has had a problem similar to this?

ORIGINAL: wasvette

ORIGINAL: hotairgypsy

one thing that keeps lingering in the back of my head is also spark plug...When rode my MCs if I got a fouled plug it would be herky jerky and would feel like the brakes were on...On a MC there are 2 or 4 plugs depending on vtwin or inline so when it happens it is more obvious. It only takes one to give you grief...what sucks about plugs, at least in my experience, when they are fouled you might as well replace. I have tried everything to UN-foul them and I have never been successful.did you change out the fuel filter before or after you started having the issue...did the issue start right after the swap out?


hotairgypsy (http://www.mustangforums.com/showProfile.asp?memid=59163) The car runs perfectly when I put the stock tune and airbox in....so I'm thinking the plugs are OK even though they have a lot of miles....if it performed badly all the time I would think spark plugs were a possibility....does this make sense?

titleAndStar(193,0,0,false,",")





you are right if the seafoam jacked something up then when you went back to stock it would run like crap. If it is running prefectly before tune and CAI then you have narrowed the issue...I personally have the JLT CAI and I didnt have a single issue. Before i installed it I had the tune for it on my programmer ready to go. I opened hood and installed it. When under the hood was done I then programmed it before taking it out of the garage. never looked back..It is all about the tune and the bypasses in the programming if any are needed...

First I would never pour anything into my gas or oil or coolant, Additives are not needed period!! Also if this is a SCT SF9415 then it has a 93 octane tune for the factory airbox as well as STEEDA and a bunch more cai's!! I would try that tune and see how it runs, also I have seen those tubes have a hair thin crack somewhere causing problems too!! Just some ideas to think about!!

ORIGINAL: 2cokeman

First I would never pour anything into my gas or oil or coolant, Additives are not needed period!! Also if this is a SCT SF9415 then it has a 93 octane tune for the factory airbox as well as STEEDA and a bunch more cai's!! I would try that tune and see how it runs, also I have seen those tubes have a hair thin crack somewhere causing problems too!! Just some ideas to think about!!


2cokeman - Lots of things learned here...no gas additives, don't assume a CAI designed specifically for your vehicle will work, etc. I'm starting to become re-accustomed to the stock box and tune. Should protect me from speeding tickets for sure.

I have the steeda cai but I didn't get the sct with their tune. I have the sniper so I had to build my tune from scratch with an afr sensor. With the first tune it was running on the lean side and would act very simmilar to the prob your describing, once I got the afr to 12.8 to 13.0 it runs great. Since you have the steeda tune it sounds more likely that when you installed cai you had a crack somewhere in the plumbing, these cars are VERY sensitive to extra air, or extra fuel. Couple of quick questions, do you have the steeda intake tube, if yes check the connection at the throttle body this area is easy to have a small crack in, also how does the car idle upon initial start up when cold. When my tune was off on cold start up it would rev really high and bounce around for a while between 1200 and 2200. Just my 2 cents but it sounds like the tune.

ORIGINAL: mriverdude1

I have the steeda cai but I didn't get the sct with their tune. I have the sniper so I had to build my tune from scratch with an afr sensor. With the first tune it was running on the lean side and would act very simmilar to the prob your describing, once I got the afr to 12.8 to 13.0 it runs great. Since you have the steeda tune it sounds more likely that when you installed cai you had a crack somewhere in the plumbing, these cars are VERY sensitive to extra air, or extra fuel. Couple of quick questions, do you have the steeda intake tube, if yes check the connection at the throttle body this area is easy to have a small crack in, also how does the car idle upon initial start up when cold. When my tune was off on cold start up it would rev really high and bounce around for a while between 1200 and 2200. Just my 2 cents but it sounds like the tune.


mriverdude1 - Thanks for the ideas. What's confusing is that the problem only occurs after the car has sat hot for ten minutes or so. Drive for 4 minutes and it runs perfectly. I would think an air leak would affect things most of the time. Idles and runs perfectly at start up. Could it be running lean when really hot after a 10 minute parking period...then not once things cool down? This whole thing would be easier if it just did it all the time.

Talked to Steeda today. Emailing me a tune that is specific to the ecm in my car (a four digit code). They're not sure but are going to try this first.

The heat issue could come from the afr being off, when my car tune was a little too lean if I ran the car till it was hot the hesitation would go away, since hot air isn't as dense it would slightly richen the mixture. In your case since it runs worse after heating up I'm more inclined to think that your tune is too rich. On mine it would act up in the same rpm range, the cars pcm tunes fuel through 3 rpm ranges and it always seems to be the middle range that problems do occur. Of course without a afr meter this would be hard to tell. I do think the sea foam could have something to do with it as well even though when you put everything back to stock it ran fine. When you put a cai and a tuner on it brings the car closer to the ragged edge, so problems that are masked by the mild factory tune will show up.
Let us know what happens, I'm sure steeda will get it figured out, I've used parts from them for years and never had a problem they didn't straighten out.
Good luck.

If the fuel pump turns out not to be the issue, the the next thing I would check is the 02 sensors. I also don't think it's the plugs cause plugs fouling usually are first noticed in the higher rpm ranges.

My bet is fuel pump or an 02 sensor. Have you datalogged it? I had a bad 02 sensor twice and never threw a code.

Also make sure your TB is clean.

Why would a Wookiee, an eight-foot tall Wookiee, want to live on Endor, with a bunch of two-foot tall Ewoks? That does not make sense! But more important, you have to ask yourself: What does this have to do with this case? Nothing. Ladies and gentlemen, it has nothing to do with this case! It does not make sense! Look at me. I'm a lawyer defending a major record company, and I'm talkin' about Chewbacca! Does that make sense? Ladies and gentlemen, I am not making any sense! None of this makes sense! And so you have to remember, when you're in that jury room deliberatin' and conjugatin' the Emancipation Proclamation, [approaches and softens] does it make sense? No! Ladies and gentlemen of this supposed jury, it does not make sense! If Chewbacca lives on Endor, you must acquit! The defense rests...

Sorry... it was all I could think about when I read the subject...

ORIGINAL: wasvette

Talked to Steeda today. Emailing me a tune that is specific to the ecm in my car (a four digit code). They're not sure but are going to try this first.

This is probally gonna fix the hole damn thing. If its running fine STOCK you dont have bad fuel pumps, throttle bodies, injectors ect. The problem lies either in the tune or in the CAI. Work with Steeda they will get you up and running.

put in new plugs.i was going to get mine dynoed awhile back.i put in some octane boost and it followed all the plugs.

Update:

Loading new emailed tune from Steeda Friday with SCT. Talked to Steeda today and it turns out their is something funky with the tune they sent or originally. Now I'm not the only one they've seen with this issue. The good news is that they are on it and I have a good feeling this will fix it!

So, after several weeks of jacking with this it turned out to be a bad tune. They said this is the first time they've seen this. New tune now custom to my processor and voila all is good. Don at Steeda is the follow up king. This is the reason I bought through Steeda. He saw it through to the last minute.

Thanks to all that gave feedback!!!!!!!!!!!
Kevin
06 GT
Working Steeda tune and CAI