94 explorer sport fuel pump problem

[D_H]

my 94 explorer sport tends to be a pain sometimes. for example i drove it to work and after working about 5 hours went to start my truck to go get lunch. it cranks but wont turn over and i can't hear the fuel pump kick on. so i wait a couple min and try to start again and it turns over no problem go to get food starts right back up. get back to work finish my shift another 4 hours later go back to my truck and it does the same thing this time i try every couple minutes then wait for about 20 minutes to go by and it turns over. take it home go to start it in the a.m. and nothing. wait a couple days trying to start it once a day. third day buy a fuel pump relay and it acts normal when i put the new relay in. so i take the new relay back out and put in the old one works just fine. any suggestions? the fuel gauge isn't working either hasn't since i got the truck a year ago. could it be the fuel sending unit? i kind of went the cheap way since i need my truck to get to work.

 

[Verno]

An intermittant problem like this is more likely electrical than mechanical. Hardest part is the problem has to be present while troubleshooting it. I would trace wires starting with the ones on the inertia switch, then to the fuel pump. When you say it cranks but won't turn over I'm confused...

 

[marragtop]

Maybe I'm not reading this correctly, but... why not leave the new FP relay in and see if the problem ever re-occurs?

 

[CmdrPopNFresh]

Maybe I'm not reading this correctly, but... why not leave the new FP relay in and see if the problem ever re-occurs?

what he said. it sounds like a fuel pump relay to me...so put the new one in and see if it keeps doing it. if it does then youre looking at wiring issues

 

[db1969@aol.com]

No power

what he said. it sounds like a fuel pump relay to me...so put the new one in and see if it keeps doing it. if it does then youre looking at wiring issues

i have the same problem there is not enough power to the relay, it is not getting the proper amount the run the fuel pump, i dont know why this problem occured, because i already removed the fuel pump and it works.