Is this a sign of a new fuel pump going bad?

Performance mods and Advanced Stroker discussion.
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CJ-8_Jim
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Is this a sign of a new fuel pump going bad?

Post by CJ-8_Jim »

Installed a new frame mounted E2000 fuel pump: https://shop.advanceautoparts.com/p/car ... /5404517-P because I thought I had a fuel pump issue (I didn't, it was a fuel pressure tester loaner tool that stopped working).

I left the new pump on and now after about 200 miles, this new pump:
- whines (much louder than the old one), and
- I just noticed the sound "de-surging"/oscillating at idle and the engine rpm "de-surging" at the same time.

I have a sound file, but the forum won't allow me to attach.

I think I'm at 43 psi with my adjustable fuel pressure regulator (I've been to 2 Autozones and both fuel pressure testers show a 0 psi reading even though I have pressure -- I've been driving the stroker for 200 miles).

Your thoughts? Is this an indication of a fuel pump going bad?
Stroker: 4.59L, SCR 9.47, Hesco 1995 MPI with adjustable FPR, TJ intake connected to grill, aftermarket OEM-size exhaust.
CJ-8: mostly stock, but becoming less so.
D44 rear, 2.73 gears on 31", T-176
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Cheromaniac
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Re: Is this a sign of a new fuel pump going bad?

Post by Cheromaniac »

CJ-8_Jim wrote:Your thoughts? Is this an indication of a fuel pump going bad?
Yup. Seems that way.
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car :mrgreen:
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