Im in the process figuring out what is wrong with this 93z28 i just bought.its a stock lt1 and i just got done doing a compresion check and i was wondering what kind of presure should it have?i have like 180-190+ more or less is this good?thanks in advance,Ray **UPDATE**I just got the plugs back in fired it up,while it was running i was pullin the spark plug wires at the opti checking for spark.1-3-7 have spark but #5 doesn't.i didnt even check the other side(lazy)so would this be a bad opti?Thanks

 

Anybody?

 

no it would most likely be a bad plug wire or plug. get a meter on the wire and check the ohm's and check for external damage/burnt...
as far as cylinder pressure goes that sounds right on... just as long as the cylinders are all w/in 10% of the strongest one.

 

Thanks SS.