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Compression Test Results

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TSIHero

15+ Year Contributor
58
0
May 9, 2005
Irwin, Pennsylvania
My car has been burning oil and seemed like it lost some power so I tossed it on a compression tester and got this.

Cylinder 1: 150
Cylinder 2: 60
Cylinder 3: 140
Cylinder 4: 140

I tossed some oil down cylinder 2 and it jumped to 140.

My plugs looked like they were burned.. had black stuff all over them. Cylinder 2s plug however on the metal arc piece was white. Looked like battery acid makes a battery look. That kind of corrosion.

My car is throwing a fuel trim malfunction code so I think my front o2 sensor is dead or dieing cause my car to run rich (perhaps the black plugs).

Where should I go from here besides buying a new o2 sensor and new spark plugs.
 
You need a rebuild. Low compression that returns to normal after putting some oil down there indicates a bad piston ring. That bad piston ring is why you're burning oil.

Black plugs indicate lots of carbon and an indication of running rich. Blistered white plugs indicate an excessively lean condition. This is just my guess, but you probably have a clogged injector that made that cylinder run lean and now you've blown a piston.

Have a leakdown test performed to confirm whether this leak is from the rings, valves, or gasket, otherwise save up some cash for either a replacement shortblock or for a rebuild.
 
How can I tell if I have a clogged injector?

How much money am I looking at generally for a rebuild? Is there any rebuild kits you can buy?

Is it possible to put a full thrust bearing in the crankshaft since I drive a 2G and they came with 1/2.
 
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