Somebody please help...

[TurboBlue]

I know i've posted problems before, but i just cant seem to find a solution...

When i first got my car running again, i noticed that my A/f guage wasnt cycling back and forth under any throttle, so i said "hmm, 02 sesnor must be bad" sure enough, the next day it threw a check engine light for it, and according to the logger, it was a bad 02 sensor. So i went out and baught one, and after installing it, was suprised to see that the guage doest cycle still, not untill i get about half throttle....any less its either pegged lean or not lit at all...

Secondly, when the car is cold, it just plan old runs like ass, gas pedal is very unresponsive, car stalls at lights and idle surges real bad, and every now and then, at a light, the car will idle at like 2k, i just dont know what to do.

I'm assuming its either a vacuum/boost leak, or maybe a bad temp sensor (rough start up) but i really dont know, i need help. Any and all will be appreciated, thanks

 

[loweperf]

I know i've posted problems before, but i just cant seem to find a solution...

When i first got my car running again, i noticed that my A/f guage wasnt cycling back and forth under any throttle, so i said "hmm, 02 sesnor must be bad" sure enough, the next day it threw a check engine light for it, and according to the logger, it was a bad 02 sensor. So i went out and baught one, and after installing it, was suprised to see that the guage doest cycle still, not untill i get about half throttle....any less its either pegged lean or not lit at all...

Secondly, when the car is cold, it just plan old runs like ass, gas pedal is very unresponsive, car stalls at lights and idle surges real bad, and every now and then, at a light, the car will idle at like 2k, i just dont know what to do.

I'm assuming its either a vacuum/boost leak, or maybe a bad temp sensor (rough start up) but i really dont know, i need help. Any and all will be appreciated, thanks

It's very hard to diagnose a problem like this without being connected to the car but I would lean toward a fuel problem. First a/f guage reads lean.Second car runs worse cold(uses about twice as much fuel for a cold engine than hot).Third high idle and stalling. All these symptoms would point to either a low fuel pressure problem or a vac leak. I would look for a vac leak first. Hope this helps.

 

[TurboBlue]

once the car warms up, at idle it pulls about 18-19 lbs of vacuum, so i dont tihnk thats it.

And unless my Aeromotive AFPR is bad, base fuel pressur eis set to about 39-40 w/ vacuum line off, so im not really sure.

Also found though, that according to my logger, even at idle the car reads 15% throttle, not touching the pedal at all

 

[loweperf]

I would still look into vac leak. The reason is you would have to have a major leak to cause low vac readings but with a small leak air is still bypassing the MAF. The ECU think less air is going into the engine and will adjust fuel flow to airflow the MAF is reading. This could cause your lean condition.