94 GS - Zero Compression
Riggmaster
01-07-2008, 12:56 PM
My 1994 Regal GS, 3.8L is reading 0 compression on the back center cylinder. All other 5 cylinders read high compression. The car starts right up and can drive (obviously with only the 5 cylinders). On the distributer there is spark for that wire. Any ideas?
GTP Dad
01-08-2008, 08:02 AM
Welcome to AF!!
If you have no compression there are a couple of things that could be wrong. First, you could have a bent or stuck valve that is not sealing and holding compression on the cylinder. Second, you could have a burnt valve, this was a common issue in the past but not as common now. Finally, a cracked or damaged head or piston could also cause this problem. The only way to find out for certain would be to pull the head and see what is going on. Regardless it won't be a cheap repair unless you do the work yourself.
If you have no compression there are a couple of things that could be wrong. First, you could have a bent or stuck valve that is not sealing and holding compression on the cylinder. Second, you could have a burnt valve, this was a common issue in the past but not as common now. Finally, a cracked or damaged head or piston could also cause this problem. The only way to find out for certain would be to pull the head and see what is going on. Regardless it won't be a cheap repair unless you do the work yourself.
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