Hi dave i have a 1993 jeep cheroke, i went to start it and it would only run 3 sec. replaced the fuel filter and then it would rev up to 1500 and slowley come back down, then choke itself out. now it

100

Asked by bullofthe Nov 13, 2013 at 09:07 PM about the 1993 Jeep Cherokee Sport 4-Door 4WD

Question type: Maintenance & Repair

Hi dave i have a 1993 jeep cheroke, i went to start it and it would only run 3 sec. replaced the fuel filter and then it would rev up to 1500 and slowley come back down, then choke itself out. now it only runs 10 sec, i have replaced the fuelpump and regulator, i noteced when it is running i can not hear the fuel pump. and the fuel pressure is never above 7 psi with the return line closed. any ideas?  Ben

3 Answers

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I know but I can't get it over that with it running. It's almost like the fuel pump shuts off while it's running, and right before it dies it turns on and then shuts off.

1 people found this helpful.
100

I have tried jumping it and it works but if you start it leaving it jumped does nothing, and for the oil pressure it has a single wire sensor, so it would not be switched, unless their is another one I do not know about.

1 people found this helpful.
100

I have found the problem! It was a ceramic resister that controls the fuel pump after start up it lowers the voltage to the pump so the pump lasts longer and it is not in any repair manuals, took 3 hrs of looking at online diagrams.

8 people found this helpful.

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