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#1
03-14-2007, 09:02 PM
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thump thump noise
when i start my car after sitting all night i can hear a thump thump noise in the rear of car ,its only when i first start it anybody ?
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#2
03-14-2007, 11:36 PM
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Re: thump thump noise
Don't worry mine does it too,,its just a bit of air in the muffler system 'burping' out...nothing to worry about..
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#3
03-15-2007, 01:03 PM
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Re: thump thump noise
HuH? Air in the muffler ? Wouldnt that be exhaust?..
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#4
03-15-2007, 01:06 PM
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Re: thump thump noise
the muffler is part of the exhaust. what did you think it was part of - the window?
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#5
04-16-2007, 07:58 AM
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Re: thump thump noise
sorry to you all, its the gas tank vent opening up to release preasure
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#6
04-16-2007, 08:09 AM
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Re: thump thump noise
it makes that much noise to vent? weird
__________________
 damn aveos!!!
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#7
04-17-2007, 11:31 AM
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Re: thump thump noise
Thank You for that,Hmmm,I guess The rear of the car would be a "NO SMOKEING ZONE" Ha Ha
 >>>>>>
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#8
05-06-2007, 09:30 AM
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Re: thump thump noise
I think the thumping noise is related to the emission system.
On my car it happens at exactly the same time after a cold start and it thumps the same number of times. I don't pay much attetion to it any more, but I think it's 40 seconds after engine start and 5 thumps. It doe this every cold start since the car was new. I figured it's the electronic engine control testing the EGR valve, but that just a SWAG on my part.
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#9
05-06-2007, 11:47 AM
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Re: thump thump noise
I TEND TO BELIEVE
greger691982 ... MAKES SENSE TO ME .. WHAT IS SWAG ? Last edited by procrstinator; 05-07-2007 at 10:42 AM.
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#10
05-07-2007, 10:41 AM
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Re: thump thump noise
I Counted My Thumps At 20 .....
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