[totalblackss]

I'm back again, car still running rich. I've set fuel pressure to 43 psi, changed egr valve, replaced catalytic converter and 02 sensors right bank. Car still is running rich and backfires when it gets warm. The MAP is the only thing I haven't replaced. While driving when the vehicle goes into overdrive it sputters, give it some gas then it goes away until in overdrive again. Can someone please help me out?

 

[stonebreaker]

Did you check for exhaust leaks?

 

[TheChronic]

totalblackbumper, has anyone changed your PCM program? check that your MAF is clean, although when dirty they run lean. check that the temp sensor on the front of the water pump is working correctly

 

[snakey5138999]

Go to the ECT to check your temp sensor with an ohm meter.

http://www.shbox.com/1/4th_gen_tech2.html

 

[totalblackss]

I've sent Bryan Herter all of my information for tuning my pcm. I have replaced the MAF and the temp sensor is functioning properly. Don't know what else to do at this point.

totalblackbumper, has anyone changed your PCM program? check that your MAF is clean, although when dirty they run lean. check that the temp sensor on the front of the water pump is working correctly

 

[Dan Fahey]

I've sent Bryan Herter all of my information for tuning my pcm. I have replaced the MAF and the temp sensor is functioning properly. Don't know what else to do at this point.

Not sure what you have checked.
My past experience of similar issues.
Bad Coil Wire.
Bad Ignition Cable to Opti
Exhaust Manifold Leak - one time it was broken bolts
Dirty IAC,
TPS is worn - replace it..
Bad EGR ..just plug the Vaccum line to check
ALSO you can disconnect the electrical connector to the EGR.

Hope these help

D

 

[bolivia_ss]

OMFG!!!! I'm having the same problem!!!! Please help!

 

[Boosted_RM]

Buy a cable and use TTS to collect data. The cable will allow you to collect data and avoid playing tv repairman and changing stuff until it works.

Good luck

 

[95impala]

Go to the ECT to check your temp sensor with an ohm meter.

http://www.shbox.com/1/4th_gen_tech2.html

+1 on the temp sensor. Had the same issue about 2 weeks ago.

 

[Bad Imp]

Go to the ECT to check your temp sensor with an ohm meter.

http://www.shbox.com/1/4th_gen_tech2.html

^^^ Great website for information!

 

[PHANTOM 309]

I've sent Bryan Herter all of my information for tuning my pcm. I have replaced the MAF and the temp sensor is functioning properly. Don't know what else to do at this point.

how did you check the temp sensor? it is seperate from the sensor for the guage in the dash,. it is located at the front of the motor,. sensor for the guage is in the cyl head,.
It's been my experience that over rich still fires on all eight even in overdrive etc,. but uses waay too much fuel,.along with poor performance etc,.

How did you arrive at the original diagnosis of "too rich" ??

Nick

 

[jkilo]

Total black bumper! LOL, That's rich! (pun intended)cwm4


I have a blackened bumper myself...maybe I shouldn't be laughing.

 

[954CULATR]

Im goin through this same problem.