Compression/ Knock Sensor

[9!'clipseDOHC]

Can a bad knock sensor cause extremely low compression? My 6-bolt Turbo was rebuilt and now the compression is very low (50-65). The knock sensor looks pretty bad and I was wondering if it could retard the timing enough to let all of the compression out through the valves?

 

[ADrewzki]

No. A knock sensor is not related to poor compression. Look to your pistons, head gasket, head, and valves for poor compression.

 

[9!'clipseDOHC]

O.K. it wasn't the knock sensor although it still needed to be replaced. I pulled the pistons out and the rings had frozen to the pistons. I took them back to the machine shop and they were baffled as to why it had happened but that they would fix them ASAP.