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Fuel Pump Noises
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Question
kc5deb
My truck is a 2002 GMC Sierra 2500 4x4 with the 6.0L. Currently it's got 140,000 miles (give or take a few)
A few days ago, I was driving down the highway when suddenly all power just went out of the truck. I was able to pull over to the side of the road; it never died or ran rough like it was missing, but, when I pulled over, it was idling a little lower than normal. I don't know if it makes much of a difference, but, I also noticed that the A/C just wasn't cooling. It was set as cold as it could get, and it was just "comfortable"; normally, even on a day as hot as it was, it would freeze me out.
There were no codes or warnings, temp on the engine and transmission were normal. I turned off the engine, let it sit for a few minutes, and started it again. I pulled back on the highway and it seemed to have most of it's power back as I drove it around most the rest of the afternoon (and the A/C went back to freezing me out like it normally does).
I talked to a few mechanic friends of mine I trust, and they suggested the fuel filter... ESPECIALLY after I told them I had never replaced it, and they told me it needed to be replaced at LEAST every 15,000-20,000 (if not more often).
I replaced the fuel filter this afternoon, and sure enough, it was plugged so bad that I thought I was going to blow a lung trying to blow air through it. It dawned on me too that the high pitched "large angry mosquito" noise it usually makes is now gone... honestly, I don't remember hearing it the last month or so like I have been the last year or so. I was concerned about this noise before, and a few mechanics told me that the fuel pumps just "whine" sometimes, and to not worry about it.
I am noticing now (and I noticed that it was doing it after the other day's "episode" too) that the truck seems to be surging just a bit. Nothing that's going to throw you in and out of the seat, but, it's a bit noticeable.
I also put my ear against the gas tank while the engine was running, and I can hear some odd noises....
One of which is a slight clunking/clattering noise; the kind you hear from a cheap fan from walmart when a bearing is going out in it's motor.
The other is a whining noise that goes up and down in speed, like a motor trying to spin up, then spin down, and it does it in nonsensical way with no repetitive pattern to it.
Everyone's opinion is that the fuel pump is going out (and probably soon), and with the way I treated it by not replacing my fuel filter like I should have, and the fact that it's never been replaced in it's 140,000 mile life, I tend to agree. But, I'm the kind of person who would like a few more opinions before I dump $600+ in replacing the fuel pump. Not that I don't trust my friends... I just don't like spending money... especially money on replacing something that it still working good enough to keep my truck running for the moment.
Opinions? Easy way to tell if it's the fuel pump or not? Are the noises I hear indicative of a faulty fuel pump?
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