Bubba1951

You could be right. If you are the OP will probably have a failed pump in the near future. They don’t like to work hard. They tend to be problematic even when filters are changed regularly.

vipmiller803

Nice work catching it. You probably saved your pump from premature failure. Likely the noise was the pump basically deadheading with just enough making it past to run the engine. It would have been cool to see live data for fuel trims, especially at WOT with that bad filter as well as a scope with an amp clamp on the pump before and after the filter change.

What prompted the replacement to start? Goes to say that if it ain't broke, don't fix it - you can do more harm than good, even with new parts.

Hoganryan40

More likely a faulty install.

RPGR90s

I had the same exact issue last fall after installing a new AC Delco fuel filter in my 2000 C5. The whine got worse and worse until I finally checked the fuel rail pressure and found it was pegging my gauge. (over 100psi). Pulled that thing out, send it back and installed a WIX filter and it's back to the way it was.

1. Normal fuel pressure
2. A little whine when starting, but quickly goes away

RPGR90s

Hoganryan40

Did we ever get a resolution to this thread?

ArmchairArchitect

So is the moral of the story to not buy AC Delco fuel filters since more than one person had issues with them? And buy an aftermarket one instead?

fairct

my current ac delco filter seems fine. I'll check to see if I still have a fuel pressure gauge and check the rail pressure. I didn't think to check it before or with the bad filter.

to answer an earlier question, I replaced the filter as preventative maintenance. I have no idea how old the previous filter was.

leadfoot4

So tell us, Einstein, how you come to that conclusion? Unlike universal fuel filters, which have a simple nipple on each end, and could possibly have their inlet and outlet ends reversed, the C-5 Corvette filter has a threaded on, compression fitting on one end, and a "push clip" fitting on the other. It's virtually impossible to get it wrong..........

93Polo

I am using NAPA which is a Wix filter no problems.

93Polo

..and if you did fuel would be leaking telling the story.

wcsinx

I'm detecting a common theme with this HoganRyan character. He likes to talk a lot, but usually has no ******* clue what he's talking about.

MetalMan2

Been following this thread, as I recently installed a new AC Delco fuel filter as well. At the same time I also replaced the H-pipe with a Borla X-pipe. But the car developed a little noise after installing these items, which I attributed to the X-pipe... but maybe it's the filter! I think it's worthwhile looking into a replacement option, though admittedly I'm not keen on just throwing parts at it. At the moment I don't have a way to measure rail pressure. Perhaps I can try a $20 Duralast/Autozone filter just for a point of comparison.

helga203

I'm sorry guys but maybe using a drill

leadfoot4

HOWEVER, let me say this about that....I replaced the filter on my 2001, when it was 4-5 years old, just as a general maintenance thing. A few years later, I began to smell gas, but never found any visible leaks. Long story short, the seal on the output side of the filter was indeed dripping. The reason for no evidence, is that the filter is located directly above the LH exhaust pipe. The slight dripping was being vaporized by the hot pipe. Of course, I replaced that filter, ASAP. I'm thinking that maybe the ethanol content of current gasolines may have attacked the rubber o-ring that seals the output side.

I've detected that, too..........