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Fuel pump 1986 rodeo

Fuel pump not working sometimes

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May be a loose wire.

Posted on Apr 22, 2013

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Posted on Jan 02, 2017

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My fuel pump is not working


check to see if theres a big dent in your fuel tank, sometimes that will stop the pump, or it just needs replaced, before that though check your filters, there should be 2 of them

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Fuel pump in my 97 rodeo works if i wire it to the battery,but does not work when i plug it in where it belongs.I've checked the fuses and they all look fine.


Same thing happened to me on my 1996 isuzu rodeo. My fuel pump worked part of the time. I actually bought a new one, then tested the old one when I removed it. Like you, I hard-wired it to the battery. It turned out to still be good.

It turned out to be a bad ground connection from the fuel pump. You can check it by --- 1) hooking the fuel pump back up where it belongs, 2) splicing a wire from the ground wire coming from the fuel pump and 3) grounding the wire (loosen a bolt head on the undercarriage, stick the stripped wire tip between a bolthead and undercarriage surface, then rachet the bolt head back tight. Then 4) just turn the ingnition key and see if the fuel pump engages and the engine starts.

Good luck!

Jul 15, 2009 | 1997 Isuzu Rodeo

1 Answer

SENDING UNIT ???????


most of fuel pumps were in tank, wire corrodes is harness under right front seat floor pan to tank
if fuel pump buzz is heard and car runs and when it doesnt run you cant hear the fuel pump try
turn ignition off wait 10 seconds
turn ignition to on position to (prime or hear pump buzz)
no buzz fuel pump not working check fuel pump relay(swap with another) and try again?
you could use test light to pump wiring and make sure your getting power to pump on this prime test no power relay or wiring problem.
power at pump, but no buzz fuel pump faulty

Jul 01, 2009 | 1997 Isuzu Rodeo

1 Answer

I have a 1986 Ford Ranger 2.9 I replaced both fuel pumps and fuel pump reset switch, i cant get the fuel pump in the tank to push gas threw.


I've had this problem twice (2 different trucks). Both times it turned out to be a bad ground in the engine compartment. Look for a loose/broken wire near the battery. If you find one that doesn't have a home, ground it to the negative battery terminal and see if that fixes your problem. (The wire that I'm referring to serves as a ground for the fuel system, and the pump won't run if it's disconnected. If the wire isn't secured somewhere away from the fan, the fan can catch it and break it.)

Hope this helps.

Jan 23, 2009 | 1999 Isuzu Rodeo

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