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Old 03-08-2003, 12:58 PM
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Join Date: Mar 2003
Location: New Hampshire
Posts: 158
190e bubbling sound from gas tank


I am hearing a bubbling sound coming from the gas tank when I start the car. This only happens sometimes, it will bubble for about 5-10 seconds then stop. Is this something to worry about? What would cause this? Car is a 1988 190e 2.3.

Thanks for any help!!


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Old 03-08-2003, 04:29 PM
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JCE JCE is offline
Down to the Wear Bars
Join Date: May 1999
Location: So Kalifornia
Posts: 2,189
My 1987 300E does that as well sometimes - started doing it a couple of months ago. Speculation by my tech was that the fuel accumulator may be going bad, but to try installing a new gas cap first to rule out a cheap source of possible noise. I have installed a new gas cap but conditions haven't been right for the sound to appear. Usually it shows up if the car has been run for a while on a warm day, parked for 10-20 minutes, then re-started. As it gets into the 70s next week, I may have a chance to see if the cap fixed the problem. It would sure beat paying for a new accumulator.

bubble bubble, toil and trouble! Tech help needed

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Old 10-30-2004, 11:31 AM
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Join Date: Mar 2000
Location: Outside Indianapolis, IN
Posts: 214
My E420 has been doing this on and off for about a year or more. I replaced the vent check valve under the tank, and the gas cap. No help. Anybody solved this yet?

Bob Johnston
03 E55
Comand/Nav/Bluetooth/Ipod added
(Oh man, this car is sooooo fast.)
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Old 10-31-2004, 12:31 AM
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Join Date: Jun 1999
Location: Surrey, Beautiful British Columbia, Canada
Posts: 750
Had a similar situation before. A new gas cap from the dealer fixed it. My jeep grand cherokee is also doing this lately. I hope the new gas cap will also fix it.


Prayers bring forth enlightenment.
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