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Thumping/snapping sound underhood
I was testing the MAF sensor on this car. In the course of doing so I was holding the RPM at about 2500 rpm to read the air flow through the MAF. I noticed the car would occasionally make a random thumping sound that would sometimes sound like a loud snap. I c... Login to read more. ![]()
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| Engine | 3.8 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1991 Buick Park Avenue 3.8L
| Engine | 3.8 L |
| Trans | 4-speed Automatic (Electronic) |

16 Replies Received
16 Replies Received