[batchman]

Originally Posted by efnfast

Welcome aboard. I'm not far from you and can offer help for what it's worth. I've owned mine four 4 years, and am no stellar mechanic. But willing to lend a hand, or an ear.

I resemble that remark! Me too on all counts, except our Z has been ours (really my wife's) for a bit longer. I do have a cheapie contact stethescope (ok, how do you spell that) if that'd be helpful.

Jerry's done some good sleuthing to match it to idle speed, rules out the cam timing stuff. I can't really listen to it but another possibility could be an exhaust valve seat problem. If you do compression test don't stop there - do a leakdown too.

Best of luck and happy to help however I can,
- Jeff