Fuel pump noise??
Administrator
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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St. Jude Donor '03 thru '25
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Common problem with the early models. Here's some info that was posted on the forum a while back:I got that fuel tank insulator pad (part #12493728), and had it installed as per GM service bulletin 99-06-04-052.....
http://www.corvetteactioncenter.com/...7DRattle+Noise
MAN what a difference! The noise is still there, but it's reduced by about 50-60%. I can hear myself think now. I may still get a new pump later on but this made a huge difference for me. I tried replacing the fuel filter first and that didn't help squat.
If you've been living with the pain of that whiny fuel pump, I highly recommend that fix!
I got it from gmpartshouse.com for like $24 or something like that, but it's hard to find now, limited stock. It's basically like a 12"x12" x 1/4" thick foam pad (measurements approximated) that you stick to insulate the noise, you could probably just make it yourself if parts become scarce.
The pad gets stuck on the tank, between the tank and the underbody.
1999: Service Bulletin: Left Fuel Tank to Underbody Contact/Rattle Noise
Subject: Left Fuel Tank to Underbody Contact/Rattle Noise (Install Foam Insulator Pad)
Source: Chevrolet Service Bulletin
Number: 99-06-04-052
Models: 1999 Chevrolet Corvette
Condition:
Some customers may comment on a rattle type noise that appears to be coming from behind the driver’s seat area. This noise typically can be generated when the vehicle is operated in a manner that results in a body twisting motion, such as turning into a steep driveway.
Cause:
The forward vertical face of the left fuel tank may contact the vehicle underbody in the kick-up area rearward of the driver’s seat during certain driving maneuvers.
Correction:
Install fuel tank foam insulator pad, P/N 12493728, between the vertical forward face of the left fuel tank and the vehicle’s underbody following the service procedure below.
1. Raise the vehicle and suitably support.
2. Remove fuel tank shield from left fuel tank.
3. Support left fuel tank strap and tank assembly.
4. Remove fuel tank strap bolts.
5. Lower fuel tank strap and tank assembly to gain access between the front surface of the fuel tank assembly and the underbody, approximately 25 mm (1 in.).
6. Remove the backing paper from the foam insulator pad, P/N 12493728.
7. With the wide side of the pad facing downward and the sticky side facing towards the tank, carefully slide the pad between the tank and the underbody. With the pad positioned centrally cross-car on the vertical face of the tank and approximately 50 mm (2 in.) from the bottom surface of the tank, press on the pad securing it to the tank.
8. Raise the fuel tank strap and the tank assembly up into position and hand start the fuel tank strap bolts.
9. Tighten the fuel tank strap bolts in the following order:
Tighten the fuel tank strap bolts to 25 N.m (18 lb ft).
• Front inboard bolt.
• Middle inboard bolt.
• Two outboard bolts.
10. Install the fuel tank shield and hand start the attaching bolt and nut.
11. Tighten the fuel tank shield attaching bolt and nut. Tighten the attaching bolt and nut to 25 N.m (18 lb ft).
12. Remove the supports and lower the vehicle.
Parts information: Part number: 12493728, Description: Tank Insulator Pad
Melting Slicks
Joined: Jun 2009
Posts: 2,914
Likes: 10
From: Jesuit Bend Louisiana
Now that's funny!!
My 2004 has some fuel pump noise, actually my Silverado truck has about the same noise BUT the Corvette's fuel pump is 18" away from you and the Silverado's fuel pump is 8 feet away from you. So either modify you exhaust to tune out the fuel pump noise OR go to DoubleD Mods and get some better sound equipment!!
My 2004 has some fuel pump noise, actually my Silverado truck has about the same noise BUT the Corvette's fuel pump is 18" away from you and the Silverado's fuel pump is 8 feet away from you. So either modify you exhaust to tune out the fuel pump noise OR go to DoubleD Mods and get some better sound equipment!!
Team Owner
Joined: Jan 2009
Posts: 73,568
Likes: 33
From: Somewhere in Mo
St. Jude Donor '09-'10, '14
Now that's funny!!
My 2004 has some fuel pump noise, actually my Silverado truck has about the same noise BUT the Corvette's fuel pump is 18" away from you and the Silverado's fuel pump is 8 feet away from you. So either modify you exhaust to tune out the fuel pump noise OR go to DoubleD Mods and get some better sound equipment!!
My 2004 has some fuel pump noise, actually my Silverado truck has about the same noise BUT the Corvette's fuel pump is 18" away from you and the Silverado's fuel pump is 8 feet away from you. So either modify you exhaust to tune out the fuel pump noise OR go to DoubleD Mods and get some better sound equipment!!
I notice it when I pull into the garage and let it idle.At idle the Quad Powers are pretty quiet actually. But hey, at least I know it's working
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Now that's funny!!
My 2004 has some fuel pump noise, actually my Silverado truck has about the same noise BUT the Corvette's fuel pump is 18" away from you and the Silverado's fuel pump is 8 feet away from you. So either modify you exhaust to tune out the fuel pump noise OR go to DoubleD Mods and get some better sound equipment!!
My 2004 has some fuel pump noise, actually my Silverado truck has about the same noise BUT the Corvette's fuel pump is 18" away from you and the Silverado's fuel pump is 8 feet away from you. So either modify you exhaust to tune out the fuel pump noise OR go to DoubleD Mods and get some better sound equipment!!
Mine gets noisier after about an hour or so driving at highway speeds.
