Fuel pump questions '94 Chev pickup


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Fuel pump questions '94 Chev pickup

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Anonymous Poster
tinknal@hotmail.com

Apr 1, 2007, 10:11 AM

Post #1 of 4 (1395 views)

Fuel pump questions '94 Chev pickup	Sign In

I have a '94 chevy pickup. Friday it was running rough, especially under a load. It was cruising ok on flat road but as soon as I hit any kind of incline I didn't have enough power. The next day the truck would not start. I'm thinking fuel pump. My question is could a relay fail like this, or do they go to heck all at once? Is there another relay on the truck that I could swap out just to test it?

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Anonymous Poster

Apr 1, 2007, 11:04 AM

Post #2 of 4 (1393 views)

Re: Fuel pump questions '94 Chev pickup	Sign In

OK, update. The relay clicks on when I turn on the ignition, the pump runs and turns off like it should, and I have good spark. I'm starting to think fuel filter, does this sound reasonable? Where is the filter, is it in the throttle body where the fuel line gos in?

steve01832
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steve01832 profile image

Apr 2, 2007, 3:50 AM

Post #3 of 4 (1379 views)

Re: Fuel pump questions '94 Chev pickup	Sign In

The fuel filter is under the vehicle on the left side frame rail. It is a little ways in from the fuel tank. You should change the filter and make sure you have new 0-rings for the fuel lines. Then do a fuel pressure test. You can get a fuel pressure guage at AutoZone for about $25.

Steve

DanD
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DanD profile image

Apr 2, 2007, 4:14 AM

Post #4 of 4 (1378 views)

Re: Fuel pump questions '94 Chev pickup	Sign In

To add too what Steve has said; just because you can hear the pump running it doesn’t guarantee that it’s producing the proper amount of pressure.
A 94 V6 or small block back then were still likely TBI (throttle body injection) and the pressure should be in the range of 9-13 psi.
Dan.

Canadian "EH"

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