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Ever since it got warm here, I've noticed my car has been making a katchunka-chunk noise coming from the rear of the car as if it had a compressor adjusting the suspension. It only happens once in a while but has me worried. Is my fuel pump about to crap ? Or can anyone give me a reason why this is happening. As always, any help would be appreciated.

 

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Yeah, I missed the evap link that you included in your post last night. Thats definetely what I'm hearing. Thanks alot for putting my mind at ease.