My 96 2.3 5-speed usually runs well. HOWEVER after running errands all over town in warm-to-hot weather I have experienced an odd problem. The truck will start idling erratically, getting low and choppy. On acceleration it lurches and barely gets up to speed. Finally, at the next stop in does the idle thing and the engine finally dies. Cranking and cranking will get it to pop a couple times but will not start. After 15-20 minutes of cooling off it will start up and function normally. Describing the issue its almost like it has run out of gas...that's the sensation.

It's got a brand new fuel pump and in line filter. In cool weather I do not experience this problem AND it doesn't always do this in warm weather. I feel as if the problem must lie in the fuel delivery system to the throttle body but that's just a guess.

No codes on the scan and no check engine. I'm up for any suggestions. Thanks to my fellow members.

 

The first thing to check is the fuel pressure, key on ...key on running... even though its a new fuel pump?

 

Could the FP regulator get wonky in hot conditions? Thanks!

 

When it's not starting, will the CEL come on when putting the ignition to On?

 

How many miles on this '96?
Your pistons' tops and cylinder heads have a thick layer of carbon on them.
It heats up and louses up fuel delivery.