I have a 1987 gmc jimmy that wont start..back in june i replaced the fuel tank,fuel sending unit,fuel pump,new filter,fuel pump relay,esc module,spark knock sensor,map sensor, spark plugs, distributor cap and rotor button...the jimmy ran good for a few weeks..then while drving around i hit a bump and about 5sec later the jimmy shut down...the jimmy started back up and was running a little rough but then finally started running normal...i was about 80 miles from home...ran good all the way home except one time at the red light it shut off but started back ok...when i was about 200 yards from home i hit another bump and it shut off again...coasted into the yard and it started back up ok once again..the next day drove it about 10 miles and it shut down again and then would not start back up...i can crank it with starting fluid for about 2 sec then shuts off...i had a extra ecm so i changed it out but that did not help things...I NEED HELP???
Yea you have no fuel and sound like a bad harness and the gm's are know for there fuel pump harness's! did you change it when you changed the pump? there is a lose connection somewhere in the fuel delivery system and it's pretty simply! i would check the fuel pump relay on the left hand side of the engine compartment and maybe even put power to the pump at the relay position "b" on the fuel pump relay harness and there should be a one pin connector to put power to also connected to the same position on the relay "b" the wire should be tan and white! good luck
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Hi there thanks for the response...yes i changed the harness...it came with the new sending unit...i bought the sending unit from LMC..i can hear the pump loading up when i turn the key to the acc postion and after trying to start the engine.
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