1994 z28 This car runs great when 1st cranked .After you get up to normal operating temp. it skips really bad.what do you think is going on,optispark ,fuel pump, injectors?

 

how about some help 8 days no help?

 

See if you can get the car scanned for any error codes, even if the light isn't on. The fact it runs bad after the engine warms up makes me believe it's sensor related, as some sensors are bypassed when the engine is cold (system in open loop mode). I've had a bad opti before, and as to be expected, the engine ran crappy both cold and hot.

 

thanks for the help. MAF sensor?

 

O2 sensors or a wire laying on your headers.