E46Fanatics - View Single Post - Engine knocking sounds... Please help!
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Old 05-27-2012, 07:08 PM   #4
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Join Date: Mar 2012
Location: Fort Myers, FL
Posts: 388
My Ride: BMW 325i 2002
Thanks for your fast responses guys! I just changed the spark plugs to NGKs... but it didn't solve the problem :/

One of the guys at Auto Parts said that it is back firing too... I don't know what that means.. gonna do my research now.

I also suspect that vacuum leak. What are the places where the vacuum leak is possible besides intake boot and intake tube?
farukh is offline   Reply With Quote