Trying to diagnose a miss/tick/knock.

[jdyates]

Its a loud noise at idle. Sounds exactly like when two bolts had come off the passenger side exhaust flange, but more severe. Also, I just discovered the compression on the pass. side is 160 versus the 175 on the driver side. Makes me winder of I blew out the exhaust donut, or if I maybe have weak valves? What do y'all think? Its very inconsistent, it may idle for 10 minutes before ticking, or it might be right away. Sometimes its so severe that the computer has to compensate for the low RPMs and Rev up a bit.

 

[Damn]

Well ticking can be an exhaust leak or a loose rocker arm or even a stuck lifter.

 

[jdyates]

My whole exhaust from the Y-pipe back is new and I cant hear any leaking. I think it may be a manifold gasket or flange donut. I need to go out and listen closely, because it doesn't sound out of the ordinary.

 

[GMstrong]

Does it get louder as you rev or go away?