ok. about the codes im throwin..here are some st & lt fuel trim readings
ok so codes are P1150-1152 and P0171. the fuel trims are below and i dont quite know what they mean. but i think they deal with the fuel air ratio. and this is apparently what caused the P0171 code as it was described to be the culprit by the code reader. this was in the freeze data, which im assuming is when the code threw this is what the computer read.
said i was going 32 or 34 mph
was at 2282 rpm
with the oil temp of 199 degrees (this one may not be correct, as this part im recounting from memory)
ok so here goes with the readings:
short term fuel readings- 1. -5.1%
2. 25%
3. 53.9%
4. 50.7%
long term fuel readings- 2. 24.2
3. 42.1
for long term thats all it said. i tonight replaced the fuel filter and put the seafoam in the gas tank. we'll see if that helps a little more. but can anyone tell me exactly what this means, or give me an idea anyways?
and i know there are other threads related about these things , but i couldnt find anything that answered my questions.
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1997 GT Coupe. CAI and Flow 40' Duals w/ o/r x pipe, Spec Stage 1 Clutch, Spec Aluminum flyhwheel. SCT 93 Performance Tune, hurst short shifter. New AutoX Suspension on the way!! ......"other mods may not be known"
"You can put it off, but it's a matter of time till it fails and leaves you with the rubber-sole express......"
I don't have experience with the first two codes, but I do have experience with P0171.
Forgive me, because I'm super rusty on this, but I thought LT fuel trims run -25 to +25. At least thats how I remember it reading on Ford's WDS system. +25 means that the fuel system is trying to compensate for a lean condition.
In my experience, consistent maximum LT fuel trim readings usually suggest some sort of a vacuum leak. Have you made any modifications to the car recently that could affect vacuum? Have you tried spraying the top of the motor down with carb cleaner (carefully!) and listening for idle surges? This can help you pinpoint a vacuum leak.
There are other culprits for a P0171, even an improperly seated oil-dipstick. When I headswapped my '98 GT I threw that code for almost 8 months. We tried everything, including replacing the fuel filter, PCV, dipstick, etc. We were just about to replace the intake manifold gaskets when we decided to try one more thing: We checked the EGR valve gasket, and solved it! We easily saved $50 and 2-3 hours labor with a $4 gasket! We apparently damaged it during the headswap. Can you think of anything you've done recently that could have impacted engine vacuum?
Can you think of anything you've done recently that could have impacted engine vacuum?
well no. all ive done is make it better. the heres what ive done to the car mechanically.
replaced the fender well intake with a short ram and all new fittings and gaskets.
took the tb and plenum off and cleaned them.
changed plugs and oil
thats it to the motor anyways. i can hear some form of air sucking in noise but can not for the life of me find it. ill try that carb cleaner bit though. but besides that, this all started with a pretty much soaked air filter from rain water on the road
it is lean codes, and the 1150-2 codes are air fule metering not functioning correctly. but cant figure it out. have Mil elliminators cause of no cats. and i have an exhaust leak at or near the header manifold. u think one of those things could affect it?
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1997 GT Coupe. CAI and Flow 40' Duals w/ o/r x pipe, Spec Stage 1 Clutch, Spec Aluminum flyhwheel. SCT 93 Performance Tune, hurst short shifter. New AutoX Suspension on the way!! ......"other mods may not be known"
"You can put it off, but it's a matter of time till it fails and leaves you with the rubber-sole express......"
Hmm, if you took the plenum and TB off, it could be one of those gaskets. On my '98 GT, the EGR valve met the plenum and was sealed by a gasket. We never separated the two, but when we pulled the plenum to install the PI manifold, we must have stressed where the gasket meets the plenum.
I highly suggest the carb cleaner test. It really works!
P0171 is a gas air leak. usually it goes on when your engine is running and you open the gas gap to put gas. or gas cap is bad. also check vacuum lines from plenum intake to the EVAP usually the hoses tend to break to dust depending on the usuage. or hose came unplug around tank or by the passenger front tire, evap charcoal is bad if you here loose parts inside. usually you can smell gas.
expand upon that 00BLACKSTANG...
I've been having a problem driving me CRAZY for months,
whenever I refuel the gas nozzle shuts off like 30 times to pump twenty dollars worth of gas and I can hear air hissing out the filler neck?? Do have a plugged line back there? Also when I turn on the Vent control I get a faint fuel smell sometimes??
P0171 is a gas air leak. usually it goes on when your engine is running and you open the gas gap to put gas. or gas cap is bad. also check vacuum lines from plenum intake to the EVAP usually the hoses tend to break to dust depending on the usuage. or hose came unplug around tank or by the passenger front tire, evap charcoal is bad if you here loose parts inside. usually you can smell gas.
I'm sorry P0171 it means when running lean or to much air coming in for to little gas. Problems is that air mass sensor is dirty or bad or a recent modification was made making it to suck more air. THe post avobe this one is the code P0145 where there is a problem with the charcoal evap.
BRUTAL METAL I think one of your air gas hoses is pintched, clogged or some thing causing the air not to escape and instead the air from the tank is getting out from another side which is causing it to have gas smells or filling issues.
I'm sorry P0171 it means when running lean or to much air coming in for to little gas. Problems is that air mass sensor is dirty or bad or a recent modification was made making it to suck more air. THe post avobe this one is the code P0145 where there is a problem with the charcoal evap.
BRUTAL METAL I think one of your air gas hoses is pintched, clogged or some thing causing the air not to escape and instead the air from the tank is getting out from another side which is causing it to have gas smells or filling issues.
hey i think i fixed it. read my other post. was a leak in the tb where something went, but not sure what it was. look at the pic
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1997 GT Coupe. CAI and Flow 40' Duals w/ o/r x pipe, Spec Stage 1 Clutch, Spec Aluminum flyhwheel. SCT 93 Performance Tune, hurst short shifter. New AutoX Suspension on the way!! ......"other mods may not be known"
"You can put it off, but it's a matter of time till it fails and leaves you with the rubber-sole express......"
ok. about the codes im throwin..here are some st & lt fuel trim readings 
I'm sorry P0171 it means when running lean or to much air coming in for to little gas. Problems is that air mass sensor is dirty or bad or a recent modification was made making it to suck more air. THe post avobe this one is the code P0145 where there is a problem with the charcoal evap.
