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84z28 4/19/2010

1985 Chevrolet K5 Blazer Custom 8 Cyl 5.7L


Why is my engine vibrating and underpowered yet smooth when it is not working hard.

The engine is from an 85 blazer but is in an 84 Camaro. I wasn't very nice to my car a few days ago and was running it real hard. There had been a click during the hard use, I added oil, maybe too much, and it went away.I did an oil change yesterday and the click went away and is still gone. The engine is old and tired but it is under-performing what it had been doing. It vibrates even with the rpms and shakes the whole car. When I do get it to higher rpms it almost "settles out" when there is no load on the engine. Just looking for some ideas as to what the problem could be.

1 Answer

Gary Reid

Gary Reid 4/26/2010

Suggest you do a compression test. Could be a bad cylinder!


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