lean lean lean HELP!!!
Login  | |
|
lean lean lean HELP!!! - 11/16/2005 6:20:10 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
My car is running lean you can tell by the way it idles and the way it smells. i have lots of fuel presser and good vac. and the timming is a stock10*. im always getting code 91 and 41 lean codes. i have cleaned my maf but its a no go. could i need a new maf. Pease help im going to drive the car off a cliff. thanks
|
|
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 6:33:33 PM
|
|
|
Tims 88GT
Posts: 7633
Joined: 1/19/2005
Status: offline
|
before you drive it off a cliff tell me ill take it lol. take a step back and chill for a second, now what does the car smell like? how do you know its lean, if it is one of the codes you have what are they, how does it idle and what is the vac?
_____________________________
[img=http://img85.imageshack.us/img85/4844/cobralk6.th.jpg]
quote:
ikeybmg
chatterin is just like... i dunno, taking a tator chip bag and crunching the heck out of it.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 7:17:20 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
haha the code is 91 and 41, my mechance said it smelled lean and idled like it was lean, my vac was at 15 at idle. i get the codes all the time when its running, my fuel pressure is a 43 at idle.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 7:19:18 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
oh and the gases burn your eyes like crazy, i keep hereing 91 and 41 means the car is rich but i thought it ment lean.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 7:23:18 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
oh ya one more thing, with the iac unplugged the cars idle will slowly come up to 1000 then drop to 700, it sounds like i got a crazy cam in it but its stock.as you can see i really want to get this fixed soon, thanks for the help
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 7:29:36 PM
|
|
|
spudz
Posts: 199
Joined: 11/15/2005
Status: offline
|
I really think maybe your car is running rich instead of lean... Go find another "my mechanic" lol. Um first guess would be maybe your O2 sensors BUT I THINK that the fuel pressure is a little too high... I don't think it should be over 40... Maybe your fuel pressure regulator???
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 7:33:52 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
the O2s are like 4 months old, is did the samething with the old ones. some one said code 91 and 41 means the car is at its lean limits and so its rich is this true. and i tryed putting a hose on the FPR and sucking on it it wouldnt go under 41 is that right.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 7:44:29 PM
|
|
|
spudz
Posts: 199
Joined: 11/15/2005
Status: offline
|
Well, those codes actually mean lean.... BUT when your car thinks its lean....it tries to make up for it by making it run REALLY rich. Sure there are no vac leaks???? Also if the new O2 sensors are cheapo parts house sensors, they are prolly bad outa the box.... ALWAYS use ford sensors on fords. Get your DVM out and measure the voltage from the O2 sensors with the car running. This is true on all cars....O2 sensors in front of the cats.... should be fluctuating from say 200-800mv or close. If they are stuck or stay under say 400mv they need replaced. 400mv and less is lean.. O2 sesors behind the cats DON't fluctuate as much. They stay around mid range. I dunno if this helps or not.. But I think your "my mechanic" needs to be replaced. BTW I am a mechanic... But I work at a GM dealership lol.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 9:28:42 PM
|
|
|
silver91gt
Posts: 2970
Joined: 3/8/2005
Status: offline
|
it sounds like you have a vacum leak.
_____________________________
novi powered 347 11.6@121mph
with a little spray 10.7@130mph
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 9:29:57 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
it runs crappy even befor the cars in closed loop. my fuel pressure is at 43 at idle that cant be right
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/16/2005 9:35:21 PM
|
|
|
zex92mustang
Posts: 149
Joined: 11/15/2005
Status: offline
|
we checked again for vac no go, theres 15 psi at idle, so thats not it.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/17/2005 7:01:05 PM
|
|
|
Tims 88GT
Posts: 7633
Joined: 1/19/2005
Status: offline
|
your mechanic is stupid your car is rich, thoes codes mean that the car is rich, it should not be 43psi at idle
_____________________________
[img=http://img85.imageshack.us/img85/4844/cobralk6.th.jpg]
quote:
ikeybmg
chatterin is just like... i dunno, taking a tator chip bag and crunching the heck out of it.
|
|
|
|
|
RE: lean lean lean HELP!!! - 11/17/2005 7:29:56 PM
|
|
|
86HOGT
Posts: 2414
Joined: 9/1/2003
From: Rhinelander, WI United States
Status: offline
|
Every site I quickly looked up said that 91 is right bank is lean and 41 is system lean. Remember, always fix the lower numbered code first as it may rid the lower priority codes. Now, what makes a car run lean or a computer think it's lean is a vaccum leak, low fuel pressure, an exhaust leak, a dirty or faulty MAF sensor, or a faulty BAP sensor.
15inHG of vaccuum is on the low side. Should be around 17-21 on a fairly stock engine. This sort of suggests to me that you have an intake or vaccum leak.
Low fuel pressure is obvious, and you checked that.
If there's an exhasut leak before the O2 sensor then it will measure more oxygen in the exhaust and think its leaner than it is.
A dirty or unresponsive MAF sensor will give false signals to the computer thinking there's less air flow going through the engine and the ECU will lessen the pulse width on the injectors.
The Baro sensor is what goes out in the newer Fords, but is included in the MAF sensor. Your BAP is in the middle of the firewall and measures atmospheric pressure. If it's faulty and giving the computer a signal of 133Hz when it needs to be more in the neighborhood of 149-153Hz it will go lean because the ECU thinks its at a higher elevation. The BAP can also be checked with a DMM.
Hope this helps.
< Message edited by 86HOGT -- 11/17/2005 7:30:34 PM >
_____________________________
Take a gander...
quote:
stang8689: the shaft is very thick and strong.
|
|
|
|
|
Printable Version
