94 Z28 air/fuel ratio
 

Does anyone know how to adjust the air/fuel ratio on a 94 Z28?

Thank you.

You need to reprogram the PCM

Would a PCMforless tune help? My car is running rich, that's why I'm posting. Ok here's is what's happening to my car. On start up I have to pump the gas petal while I am cranking and it take about maybe 10 secs to start. And if I dont pump the pedal and crank it it will just crank forever.

Would a PCMforless tune help? Ok here's is what's happening to my car. On start up I have to pump the gas petal while I am cranking and it takes about maybe 10 secs to start. And if I dont pump the pedal and crank it it will just crank forever.

Can someone please help me.

Thank you.

You do not need a tune, you need to find out what is causing the problem. I suspect you may have a leaky injector allowing fuel into the engine when it is shut off. Any amount of tuning is not goig to fix the problem. Start with a fuel pressure test and see if the pressure is holding when the engine is off.

Ok thanks. I'm going to do a fuel system pressure test and see what I find out.

Thanks again z28pete

with the mods you have its needs to be tuned. solomon is the best i have come across. LT1 PCM Tuning - OBDI/OBDII PCM Tuning/Programming Service what injectors are you using? what tb? mine was way rich and would not idle well till i got it tuned.