Vibration of engine at lower speeds

2005 BMW 325I
190,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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LAURAS325I
  • MEMBER
  • 1 POST
When driving at speeds lower than thirty five mph engine vibrates. Computer indicated problem with valve number six.
Spark plugs and coil replaced. Problem continues. Plus, now I am getting hot air coming in at floor level. Maybe a hose got lose.
Aug 1, 2017 at 12:41 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,583 POSTS
Hello,

It sounds like you have low compression in cylinder number six. I would remove the plug and then flow this guide to get the job done. If you do not have a gauge you can rent one.

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

Please let us know what happens.

Cheers, Ken
Aug 2, 2017 at 8:14 AM
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