O.T 99 CHEV Fuel Pump

black · May 15, 2014

Put a new fuel pump in my 99 chev truck and it doesn't work. Is there a relay or fuse that I should check or check for power at the pump plug ?

Thanks in advance

D beatty · May 15, 2014

I would start out first and see if you have power to pump and then work my way back through system till I found the problem.

Bob · May 15, 2014

Fuel pump relay and fuse are in the electrical center over the LH front wheel well.

Sprint 6 · May 15, 2014

Does it start and stall right away? If so, the security system
may be shutting it down. Security system on that truck
shuts off the fuel pump after 2 seconds.

black · May 15, 2014

The pump won't run at all . I dumped gas in the intake and it started and run until the gas was used up.

black · May 15, 2014

Forgot to mention that the service light is on -- I suppose that could be anything failing other than the pump

Bob · May 15, 2014

"Forgot to mention that the service light is on"

How about the "security" light... flashing?

Also, how did it fail... was running and stalled?

Was running when shut down and then wouldn't re-start?

Or???

uncle henry · May 15, 2014

i had a 97 chevy that the fuel filter would stop up
and the pump would not do anything

farmer boy · May 15, 2014

Pull the fuel pump relay and see if the relay is
energized when the key is turned on. It should turn
on for about 5-8 seconds when the key is first
turned to run. What made you replace the pump? Did
it stall, or refuse to start?

4play · May 15, 2014

Like mentioned about the relay. I would start by checking the relay and fuse, they are beside each other and location is labled on the fuse box cover under the hood. I am pretty sure there is a "prime" circuit cavity beside the relay that you could run a jumper wire into to send direct power to the pump for testing too.

There was a known wiring problem with the fuel pump connector at the pump, but too my knowledge all replacement pumps have the updated wiring connector and supplied wiring/connector pigtail if needed. If not the old style connector was 2 rows of 2 pins and square, new style connector was a 4 pin flat. The old style connector was known for loose pins/bad connection and/or melting.

black · May 16, 2014

Bob : the truck was drove to the farm last year and was just parked , that's why I don't understand the problem yet --but it does have 180 miles on it .

mkirsch · May 16, 2014

A $40 code reader would've been a much better investment than a $250 fuel pump.

1206SWMO · May 16, 2014

The mice may have chewed on a wire...I just had that happen
on a car that I use several times a week..

rustyfarmall · May 16, 2014

(quoted from post at 05:11:05 05/16/14) The mice may have chewed on a wire...I just had that happen
on a car that I use several times a week..

Exactly! OR, the electrical ground may have been lost due to rust and corrosion.

GarryinNC · May 16, 2014

A failed fuel pump will not set a code, nor will a bad relay or blown fuel pump fuse.

O.T 99 CHEV Fuel Pump

black

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D beatty

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Bob

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Sprint 6

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black

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black

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Bob

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uncle henry

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farmer boy

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4play

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black

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