Fuel pump not getting power

TANMAN

MEMBER
1993 DODGE DYNASTY
200 MILES

Relay is good, all wiring looks good. It smelt like an elextrical fire when I tried to start it, had small amount of smoke in the intake, then it wouldnt fire back up, I have replaced the fuel pump, and have compression in all cylinders, just no fuel, it fires just fine with starter fluid

7 Replies

TANMAN

MEMBER
5 POSTS

200000 miles*

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Tuesday, September 6th, 2011 AT 5:09 AM

CARADIODOC

MECHANIC
33,916 POSTS

The fuel pump should only run for one second after you turn on the ignition switch. It won't turn on again until the engine is rotating, (cranking or running).

The few common failure items are working since it has spark. That leaves the fuel pump circuit. What have you tested so far?

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Tuesday, September 6th, 2011 AT 5:20 AM

TANMAN

MEMBER
5 POSTS

I just found the issue. It's the computer on the driver side. It has a short.

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Tuesday, September 6th, 2011 AT 7:14 AM

CARADIODOC

MECHANIC
33,916 POSTS

That is extremely uncommon. How did you arrive at that? What else isn't working if anything?

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Tuesday, September 6th, 2011 AT 8:09 AM

TANMAN

MEMBER
5 POSTS

I saw a small amount of white smoke coming from the intake, proceded to remove it, smelt electrical fire, removed computer cover and used a jumper wire to activate the fuel pump relay, saw the short,
the things leading to this issue were gauge malfunctions, radio/clock not working, and a parasitic drain on the battery.