I have a 92 daytona iroc v6 that has started to stumble and sometimes stall when started or at a light. Issue first started occuring randomly one day when it wouldn't start just crank until primed then ran fine. Feul pump recently replaced a few months back so I swapped out what appeared to be stock feul filter and started up fine for about a day. Now the car starts up fine but stumbles at idle and hesitates when throttle is applied or even dies. If I let it sit at idle for a minute or it dies I can start it up and drives fine but intermittently dies at stop lights and if I shut it off I have to repeat the process. If anyone has any ideas I'm all ears never encountered a problem like this. Thanks in advanced for any input.

 

Have you done plugs and wires on it?