Question:

1991 Oldsmobile cutlass supreme sl 3.1 fuel pump relay fuse blowing after ignition switch its turned over.?

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i have a 1991 oldsmobile cutlass supreme sl, the engine size is a 3.1 and the year is 1991.

the problem all started while i was driving my car. it shut off on me and i tried starting it back on and it would start. i opened my hood and checked my oil, anti-freeze, and my transmition fluid everything looked ok. i check the pressure of the fuel pump and it was squirting out normal. after a few times of trying to start the car it killed my battery.. i got a buddy of mines to JUMP IT!. and tried to start but nothing.. i took the cap of the fuel pump relay to check the fuses and i noticed the #20 was blowned. the big fuse looked ok. i changed the #20 and replaced it with a #20 and everytime i hit the ignition switch it would blow it the fuse. after a couple of boxes of fuses i check once again the pressure for the fuel pump and their was no pressure, no gas squirting out at all... i got back in the car close all my windows and try listening to the fuel pump and it did not make any noise or turned on. i check the #20 fuse in the fuel pump relay and it was blowned. i check the connections to the starter and noticed the wires where loose a little bit and where touching.. so i tightened them up and put a new fuse in the pump relay and nothing. what can i do..

thank you..

DJ P KiLLa

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2 ANSWERS


  1. Sounds like a shorted fuel pump or short in wiring harness to fuel pump. Unplug harness at connector above drivers side rear tire and see if fuse blows again. If it doesn't blow . the short is in the pump or the short pig tail to the fuel pump Have a great one!! Jake.


  2. May need a new relay switch if shorted or a new fuel pump or both.

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