SuperMotors.net Forums
kb2enj
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• Maryville, TN, USA |
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• Registered on 6/14/2011 |
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• 21 posts |
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 Posted:6/14/2011 16:33 |
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Hi, I am a new member looking for some help to resolve a noise problem. I just purchased a 2000 Mercury Grand Marquis with 83K miles. I have a thumping noise in the rear of the car when going over bumps in the road. I can recreate the noise; with the rear of the car up on ramps and the bottom of the shocks disconnected (to make it easy to bounce) when I bounce the rear up & down I hear the noise, it sounds like it is comming from the fuel tank, but not sure. I did find a TSB #14181 NHTSA #620304 which talks about a clunking noise that may be caused by the "fill limiting valve in the tank" but this car was built after 12 - 1999. The TSB did not say how to fix the problem. Any help would be appreciated, Thanks, Bob |
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Posted:6/14/2011 18:04 |
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Start by physically checking all around the area for loose parts. Sometimes road salt will rust out a bolt and the piece starts to bounce around making noise. If you have definitely pin pointed it to the fuel tank, get a pro to check it out.
*******************
PROUD MEMBER of www.crownvic.net
It's just a SUPER-DUTY Mustang GT Sedan. 198K miles and still rolling HARD.
1997 Crown Victoria P71 SVT *** ex-US Marshall service (the CAR)
STOCK?? I bet it was modified. 
13.26 @ 107.24 MPH 1/4 mi w/ me, tools, & full tank of 93 octane
I added CAI, NICHE 19 X 8.5 " wheels with 245/45ZR 19 rubbers, and completely rebuilt the front end with poly bushings, Kooks headers, 2 1/4inch exhaust, TCI 2200-2400 rpm Stall converter
.PLANS:: engine upgrade, 5.4L 2v stroker, rebuild interior in leather w/ buckets, thinking about turbos
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kb2enj
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• Maryville, TN, USA |
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• Registered on 6/14/2011 |
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• 21 posts |
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Posted:6/15/2011 18:48 |
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I have checked for loose parts several times; I did replace the insulators for the exhaust system and installed new rear brake pads.....still have noise. The car is from Florida so there is minimal rust. I had the fuel tank out of the car, inspected it but everything looks OK. I am thinking about removing the fill tube and cuting off the "fill limiting valve" which is at the end of the tube????????? |
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kb2enj
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• Maryville, TN, USA |
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• Registered on 6/14/2011 |
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• 21 posts |
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Posted:7/24/2011 22:41 |
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Well, here is "the rest of the story". After receiving no help from Ford Motor Co. (local dealer and the 800 #) I filled out the form on the National Highway Traffic Safety Administration web site to get the details about Ford TSB #14181. The person on the phone said there could be a charge up to $40.00 for the information. I received the details in the (snail) mail in less than one week and the good part was there was no charge. The TSB said I needed service kit F8AZ-9B246-AA which includes 1 fuel tank vapor control valve, 1 clamp, 2 studs and nuts for the tank straps, and instructions. Keep in mind now, this TSB is for 1998-2000 Crown Vic, GM, & Town Cars built up to December of 1999. My car was built in March of 2000!!! Since the description fits my noise problem to a "T' I was going to get the service kit. I called my local Ford dealer only to find out that the part (after 10 years) is now obsolete. I was able to find the part at Green Sales Co. in Cincinnati and the price was half of what it was at a Ford dealer that did have the obsolete part. After receiving the kit I removed the tank for the second time and installed the valve in the top of the tank. No more noise! |
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