I posted this question in a different group, and didnt get any replys. Anybody help me? Please?

Transplanted '91 FI 302 into a Jeep. After it sets overnight it starts but lopes really bad. If I cycle the key 4 times to let the fuel pump build up it starts up fine and runs pretty good. After warm up all is well. It has to set for 8-10 hours to loose fuel pressure and give this symptom. Anyone ran across this before and fixed it?

 

Hmmm, never run across this problem. What fuel pump are you using?

When I turn the key (not starting the engine) on, I hear the fuel pump turn on for a second or two to build up pressure, then shuts off once the pressure is up to ~ 35 psi if I'm remember correctly. It seems your vehicle is lacking the pressure build up initially. Are you using the OEM fuel pressure regulator?

 

Looks like you previously posted this question in the "Chat Forum". For an EFI 5.0 tech question, I'd think your best bet would be to ask in the Fox Forum(79-93 Mustangs).

We're mostly "carburetor cowboys" in the Classics Forum...

 

He's gone ahead and made a post on this subject in the Fox Forum, so I'm going to close this one. If you have questions/comments on his problem, feel free to address it here:

http://forums.bradbarnett.net/index.php?showtopic=3136