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1996 Volvo 850 Mass air flow sensor

Tiny
JAMESMOSS726
  • MEMBER
  • 1996 VOLVO 850
  • 2WD
  • AUTOMATIC
  • 172,000 MILES
My car has a rough idle only when it's in park and I bought mass air flow sensor cleaner and I cleaned it and put it back in and then I started the car again and the idle sounded smooth and then I cut it off and came back twenty minutes later and started it back up and the rough idle was back and I was just wondering if there is a way I could fix it and if it maybe something else other then the sensor
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Sunday, October 5th, 2014 AT 4:37 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
With rough idle problems we need to start with a compression test across all cylinders, I rough idle could mean one of the intake valves is leaking.

https://www.2carpros.com/articles/how-to-test-engine-compression

Let me know what you find, thanks for using the site :-)
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Wednesday, October 8th, 2014 AT 9:02 PM

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