i went on the hwy to try my nitrous
sprayed @ like 80 km/hr, check engine light came on so i shut her down turned of the nitrous and i was pulling of the hwy and i hear a knocking sound!
i took off the valve covers everythign looked fine
it started while i was slowing down
sounds like its coming from the drivers side cant tell from what!

Spark plugs are good
oil pressure is good
dunnno what to do!!

 

This belongs on LT1 Tech or N2O Tech. I see you already have posted it on LT1 Tech and your regional board, so I'll move it to "N2O Tech".

When you post a problem like this, you need to post all the info. As I recall, the first time you sprayed this system a day or so ago, you blew an oil seal out of the front of the engine. In response to that post, I suggested you might have excessive blowby, or a cracked ring land. But you ignored my earlier post and never responded. Did you followup on your earlier post? What was the oil leak? Did you insure there were no problems before you sprayed again?

You will get a better response if you post ALL the facts. Just a helpful hint.

Moving to N2O Tech......