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.
< Message edited by Cobrakev -- 7/7/2007 1:18:15 AM >
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.
_____________________________
2006 Screamin' Yellow GT. C&L Racer, Steeda UDP, CMDP, Hurst STS, BBK Headers, Pypes O/R H, MBRP axlebacks, Shaftmasters 1pc driveshaft, CHE UCA, CHE LCA, FRPP 4.10 gears, M/T ET Streets, SCT tuning by Brenspeed, black fuzzy dice!
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.
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$$.
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.
_____________________________
06 Black GT Auto Airaid CAI/Brenspeed/Summit CoP''s/FRPP 3.73''s/M-5230-GTA''s/FRPP handling pack/Roush spoiler
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.
_____________________________
personal best time: 60ft 1.88 at a time of 12.593 run....Saleen SC, 12lb boost, 4.10, 60lb inj, full suspension, LBA LTs, COI
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.
_____________________________
06 Black GT Auto Airaid CAI/Brenspeed/Summit CoP''s/FRPP 3.73''s/M-5230-GTA''s/FRPP handling pack/Roush spoiler
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 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.
_____________________________
personal best time: 60ft 1.88 at a time of 12.593 run....Saleen SC, 12lb boost, 4.10, 60lb inj, full suspension, LBA LTs, COI
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?
_____________________________
personal best time: 60ft 1.88 at a time of 12.593 run....Saleen SC, 12lb boost, 4.10, 60lb inj, full suspension, LBA LTs, COI
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 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?
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 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...
_____________________________
personal best time: 60ft 1.88 at a time of 12.593 run....Saleen SC, 12lb boost, 4.10, 60lb inj, full suspension, LBA LTs, COI
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!!
_____________________________
2008 Shelby GT500 Ebony Black with White Stripes Crimson Red Interior/Premium Trim/Shaker 500 SCT 93 Octane Performance Tuned 492 rwhp and 456 rwtq
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.
Printable Version
RE: HELP PLEASE...This Doesn't Mkae Sense! - 
