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Discussion Starter · #1 ·
I just purchased a 95 9c1 as a project car. I had a mechanic replace the head gasket, exhaust manifold gasket, and sprak plugs. He told me cylinder #5 had low compression and misfire. The car runs great excluding the misfire. I seafoamed the the the engine a couple of days ago. I changed the the oil(10w30) and plugs (Champion)again today. When I looked at the cylinder #5 plug, it seem to have of bunch of carbon buildup on it. Which mean the injector works but the gas isn't being combust...Right? The car isn't bad on gas, that's why suspected the injector. I'd appreciate the help thanks.
 

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How do you toubleshoot low compression?
first start by doing a compression test and finding out how bad, it could be a head gaskit, it could be the head. could be a ring.

chances are if its a single cylnder its a exgst vavle..
 

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Discussion Starter · #10 ·
I also notice I had oil near the throttle body when I was expecting it yesterday. I also noticed a gas smell while driving to work this morning which means it running rich...Right? Or could it be lean?
 

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Discussion Starter · #13 ·
Another thing that came to my attention. My car doesn't smoke. When piston rings need to be replaced, you will get smoke out the exhaust. I don't have that so the exhaust vlv on the head could be the issue.
 
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