miss when hot

[mmtsv]

1991 car runs fine when cold. runs rough when warm . I put new plugs, wires and cap in still run rough . It has new fuel fiter an pump in it . Any thought on what it could be .

 

[Itshakes]

Runs Rough when hot

Injectors!!

 

[Schrade]

Welcome onto the boards there!

Why did you buy all that stuff? Can you take them back since they didn't fix anything? Maybe you can trade them in for a fuel pressure gauge, and do a static and dynamic fuel pressure test, which I'm CERTAIN you need to do.

Search my posts for procedure, and search youtube for a GENERAL reference.

Post up your pressure readings.

 

[vetteboy86]

1991 car runs fine when cold. runs rough when warm . I put new plugs, wires and cap in still run rough . It has new fuel fiter an pump in it . Any thought on what it could be .

Welcome aboard!! There is plenty of information here to help diagnose any of your corvette problems.

As a few have posted before, fuel injectors is an area to check on. As far as everything you bought, was the car in need of a tune up? Probably since you decided to do it. It is good that you did it. Keeping the car running good, is essential.

Do a fuel pressure test. While the car is running, and also while it is not. There are very many recent threads and posts related to this area.