Fuel pump not priming. Now what?

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Originally Posted by krs09

ok. I headed out to the store to pick up some 14g wires and some spade male and female connectors and got to work. After i had both of the wires connected and ready to go i turn the key to on (prime) and got nothin. So i broke out the mulit meter and found i do have 5 volts going to the pump with the key on and a jumper in the rpm relay and the pump seems dead, not a thing. When i take the jumper out and put in the relay i get no reading with the key on ( normal? ). So now im thinking the pump is shot but even with no reading from the mulit meter and having the key on i can fell the hoses coming out of the pump pulsating, like fluid is flowing thru but not a sound.. Weird... Im i right in thinking the pump is dead, if im getting 5volts going to the pump with a jumper in place but the pump completely silent? Is it normal to get no reading when using the rpm relay with the key to on? Thanks to all you guys for holding my hand on this:grouphugg:

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Originally Posted by ron

i'd try jumping power right to the pump (+ and ground) off ot the battery to eliminate all wiring...

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Try it...

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Originally Posted by ron

run power straight off of the battery, as suggested, and be done with all of the guessing about the pump...
Fyi- there are small "+" and "-" marks on it, just match them up.

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....you'll like it!

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Originally Posted by SS Spoiler

I've heard that you can switch the wires to the pump and force the pump backwards to unjamb debris. then hook it up right to run it forward. Do this back and forth and often you can clear the pump to run again. Correct me if i'm wrong because I have not tried it.

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I've done this successfully - if you define success as getting another few weeks of life out of the pump. ..

+1

...the strainer had to of been bad for it to get in there in the first place...tolerances are really tight and who know for how long it's been sucking trash in there.

Dave, Ron like I said i've not tried it, but it could be a good emergency attempt to get home if your pump locked up. You're right the pickup screen would have to be bad to let in trash.

Been there, done that (was in the dunes in the UP...Michigan) - miles from nowhere.

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Originally Posted by Mark D

it's probably going to be tough to find the mating connector from the front chassis harness.

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You mean this one?

http://www.britishwiring.com/2-Way-3...tor-p/c822.htm

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Originally Posted by Farrar

You mean this one?

http://www.britishwiring.com/2-Way-3...tor-p/c822.htm

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OT but that site is a great find Farrar. I've been just browsing it getting ideas for like 30 minutes now. So many connectors that could use a refresh....

Awesome find Farrar, thanks.

I only had a few minutes to play with the car so tested the volts one more time. When I tested the volts last night the batter was pretty dead (only read 4.5-5 volts at the pump). I put the car on a charger/tender over night and when testing it again I came up with 8-9 volts with the key on and a jumper in the relay but still not a sound. I disconnected the wiring to the pump and just tested the lines coming out of the harness and got 11 volts so Im not too sure what to think yet considering the battery was not yet fully charged. I am just so happy there was a improvement in the volts considering I was terrified it was a wiring issue in the front harness. I still had that funny feeling of the hoses pulsating until I cut the power entirely. I know Ron, im going to run direct power from the battery to the pump once I have some more time. I guess ill have to wait until the battery is fully charged to get the best test. I almost want it to be a bad pump rather than a wiring issue for sure. Thanks for all the help as always.. Keep the tips coming! :thumbup: