Alfa Romeo Bulletin Board & Forums - View Single Post - Compression test results
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post #23 of (permalink) Old 09-26-2018, 09:02 AM
ossodiseppia
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Join Date: Oct 2003
Location: Broomfield, Colorado U.S.A
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Garage
Many cars ago, I owned a 16 valve VW Jetta. I took it to an independent VW/Audi shop because I could not figure out why it was running poorly at idle.

The employee did a compression test and told me my car needed a valve job. Why? It has low compression. I challenged him and asked how he ran the test. He ran it cold with the throttle closed. I came and got my car and paid my bill. On the way home, I bought a compression testor. I ran it dry/wet with the throttle wide open. The car had excellent compression. I went back to the shop and demanded that the employee re-run the test. He did, this time with the throttle wide open as per my instruction. The results were excellent. He said, "you did something to your car." ***? I got my money back.

Later, I figured out the issue, it was the differential pressure regulator.

Brian __________________________________
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