92AWDTalonTSI
10+ Year Contributor
- 334
- 7
- Jun 2, 2010
-
Somonauk,
Illinois
Ok, heres the deal.
The car I was helping tune sounded and ran fine. Then we heard noise that seemed to be a timing belt idler pulley or tensioner.
This was at idle. You could hear an inconsistent tapping sound. Not like knock you usually hear. It's evedent then goes away. 10 seconds later it's back.
The problem is: It was a slight noise before we took the motor apart. Once we pulled the spark plug cover I noticed one spark plug wire pinched between the valve cover and the wire cover. I immediately figured out why we couldn't get the car to run correctly. It wasn't getting spark on the number 2 cylinder. At all. I mean I took the plug out and the cylinder had some soot on it. But you could still see chrome. The cylinder was brown in color I'd assume from the gas. The others were a transparent black color. The plug from cyl 2 was brand new. No soot. No burn marks. It hasn't sparked since being replaced I don't know when.
My problem with this is that. When you take spark out of a bad cylinder there is no knock. It's gone other than a slight noise. Once you apply spark it comes back.
Do you think the previous owner did this on purpose?
The car was fine (Other than the slight tap.) until we fixed the spark.
How would we pull the pan with the engine still in the car?
The car I was helping tune sounded and ran fine. Then we heard noise that seemed to be a timing belt idler pulley or tensioner.
This was at idle. You could hear an inconsistent tapping sound. Not like knock you usually hear. It's evedent then goes away. 10 seconds later it's back.
The problem is: It was a slight noise before we took the motor apart. Once we pulled the spark plug cover I noticed one spark plug wire pinched between the valve cover and the wire cover. I immediately figured out why we couldn't get the car to run correctly. It wasn't getting spark on the number 2 cylinder. At all. I mean I took the plug out and the cylinder had some soot on it. But you could still see chrome. The cylinder was brown in color I'd assume from the gas. The others were a transparent black color. The plug from cyl 2 was brand new. No soot. No burn marks. It hasn't sparked since being replaced I don't know when.
My problem with this is that. When you take spark out of a bad cylinder there is no knock. It's gone other than a slight noise. Once you apply spark it comes back.
Do you think the previous owner did this on purpose?
The car was fine (Other than the slight tap.) until we fixed the spark.
How would we pull the pan with the engine still in the car?
. have you tried that old trick where you put like a block of wood to the motor while its running and the other end of the wood on your ear and listen. if its rod knock, you'l hear it 
. also i suggest not tuning it on like that until you can pull the pan and check out those bearings. either way, good luck man!
