Popping noise, any ideas? - Saab 9000 Bulletin Board - Saabnet.com
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Popping noise, any ideas?
Posted by andym (more from andym) on Thu, 7 May 2009 06:40:14
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97 9000 CS 5 speed, 150,000 miles, runs fine.
In the last two days, when the revs are around 3,000 rpm, either accelerating or just letting off the gas, I hear an intermitant popping noise, similar to an empty two liter soda bottle being hit or like a hammer hitting a loose 2x4. It seems to come from the lower passenger side of the car, can't isolate it as it only occurs at speed. Three to four pops and then it goes away for a while. Car recently passed NYS inspection, does not throw any codes/check engine lights.
I'm thinking its related to the vacuum system, but not sure where to start. This car also makes an odd nasally sound when letting of the gas in gear, but again, it runs fine.
Thanks in advance.
posted by 216.187....
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