I recently bought a 95 jimmy from a buddy who said the fuel pump was out. He gave me one to replace it but it turned out to be the wrong one. Bought a new one, changed it and fuel filter. It will now fire up and then die within about five seconds. I got a fuel pressure tester and it is only reading about 12 psi when I turn the key on, and jumps to about 180 when I crank. Any ideas what would cause this?? I read where fuel pressure w key on engine off should be 60-66... I'm thinkin it could be the fuel pressure regulator but not sure and don't want to jus shotgun parts. Any advice greatly appreciated!!!!

 

Look down the throttle body, is the passenger side really clean or showing signs of washing? If so, then it could be the regulator or leaking injectors.

 

Two different fuel delivery systems were used in 1995, two different sets of diagnostics & specs. Which engine do you have?

This is CMFI:



This is CSFI:

 

Thanks for the reminder captain, I always forget 95 was a transition year.

 

No problem, I need reminders sometimes too That one's easy for me to remember: there were 2 different fuel delivery systems, and 3 different OBD systems used in 1995 S&T vehicles. Too much "mickey mouse" for Olds to deal with so they didn't produce the Bravada in 1995.

 

Well I found the problem... Decided it was a bad fuel pump from the store a d took it back to get replaced and found out they gave me the wrong one. Put the new one in and she fired right up and is runnin great! Thanks for all the help and fast responses tho guys! Will be sure to look here if I have any other issues! Now I only have 700$ into this jimmy so im still ahead.