New engine fuel problem?

[Evil_Glen]

Me and my friend had build a 82 H.O. block up for his mustang but scrapped that project. So i took the engine. Its a 302 bored .30 over. port/polished heads. and cam.

we had though it was running lean so we tossed in a fuel pressure regulator. we put it to roughly 26-28lbs with throttle. though now it is running a little rougher than before. Also when the truck is warm i have a hard time starting it. i tossed in a high torque starter, could it be do to the fact of the my yellow top battery and not enough CCA'S? and what is the ideal fuel pressure for my engine?

 

[Seabronc]

Try shielding the starter from the exhaust. It is probably getting hot which caused them to turn over slow.

Is it EFI or carbed?

Good luck,

>-

 

[Evil_Glen]

My mistake i forgot to add that it is an EFI. i took the carb off and swapped my stock (1990) EFI onto it

 

[bidibronco]

What are the cam specs? I'm guessing that you're running speed density being it's a 90 modle. If the cam is to big then the motor will run horrible unless you have a chip to "tune" the engine. I can't tell you what to have your fuel pressure at but I believe stock is 37#'s and hopefully someone can tell me I'm right or wrong on that one. Also, make sure your timing is set correctly and I can't remember for the life of me what it needs to be. If you have an adjustable fuel pressure regulator then to make it run a little smother for now (and I wouldn't recomend this for long) bump your fuel pressure up for a little and that will "help" it a bit. The draw back to that is the fuel you'll litterally be waisting. I would recomend either swapping back on the carb or getting a custom chip burnt for your specs. That's what I'll be doing in the near future and it'll run around $400 give or take. Hope this helped a little...

 

[Evil_Glen]

cam specs

 

[Evil_Glen]

also the stock fuel presure was (if im not mistaken) 20 - 22 ish