C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

fuel filter questions

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Old Feb 6, 2002 | 04:48 PM
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Default fuel filter questions

Ok, guys. I've read the tech-tip on replacing the fuel filter on a late model C4...I've got a few questions. When should it be changed? I have 63K miles on my car now.

Should I do it myself?
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Old Feb 6, 2002 | 05:39 PM
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Default Re: fuel filter questions (Yellow Fever)

You probably should change it now. I do it every 10,000 miles. A clogged filtger will eventually affect driveability and may start setting codes for a lean mixture. Another thing is that the fuel pump is going to work harder to maintain the proper fuel pressure at the injectors. This could affect the longivity of the pump.

Another tip: Stick with the AC/Delco OEM filter. Some aftermarket filters are slightly smaller in diameter than the original equipment and the retaining strap cannot be tightened down enough to prevent the new filter from moving and rubbing against the strap. There have been several reports of fires being caused by the rubbing through of the filter case and gasoline leaking. :(

The job is easy enough to do yourself. Make sure the fuel pressure is blead off at the Schrader Valve on the fuel rail (have a rag wrapped around it to catch the run-off). Also be sure to use the proper wrenches.

Good luck.
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Old Feb 6, 2002 | 07:00 PM
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Default Re: fuel filter questions (Yellow Fever)

Ok, guys. I've read the tech-tip on replacing the fuel filter on a late model C4...I've got a few questions. When should it be changed? I have 63K miles on my car now.

Should I do it myself?
I change my fuel filter each year before parking the vette. If you've never done it before then it's gonna be a pain, but you can do it. I'm no mechanic, and I am still able to do it. You'll wanna pull out the fuse for the fuel filter, and then try to start up the car; it probably won't start, but that'll help take the pressure off. Then, as posted above, bleed off the remainder of the pressure from the Schrader valve, and then get the wrenches out. Have a cup ready to catch the fuel that will leak from the hose going into the fuel filter! It'll be 1/2-3/4 of a cup that is lost. Once I disconnected the inlet hose and let it bleed out, I was able to pull the fuel line on the outlet side of the filter up into the engine compartment to complete the swap.

HTH

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