Why is my 1991 Z71 running like crud?
I have a stock 350 TBI in my 1991 Z71 and its running like crud after the engine warms up. I just replaced the cap,rotor,spark plugs,air filter and fuel filter and cleaned the TBI with throttle body cleaner but still it runs crummy when warmed up. Mainly it bogs down and hesitates a little when I give it some gas after warm up.
Do I need to clean or replace the fuel injectors? Maybe the O2 sensor is going bad? Any other ideas?
Thanks for any advice!
***3/7/02 update - I changed the O2 sensor this morning and the truck runs great, thanks for all the feedback folks!***