Quote:
Originally Posted by 68Gold/white
You could have a timing mark issue, or balancer slip (yes even if its new).
I'd advance the cam 2-3 degrees at a time. Go out and drive it, see what it does. See if it pings under a load (like going up hill, or from standing still). If it doesn't ping, give it a little more timing. When you get it to the point where it does ping, back it off 2 degrees. Go drive it more see how it does...
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If you suspect a slipping balancer or timing mark issue, why would you run straight into changing the cam timing? Altering cam timing seems entirely unnecessary on a generic street engine and I would be surprised to find out that either the dots on the timing chain or the dowel in the cam are improperly placed. Misaligned pointer or timing tape (or lack there of), or misaligned timing gears, seem far more likely. If the balancer is the problem it should just be replaced.
The engine could be going through an entire lean-cycle. Maybe the secondaries are opening way too soon. Or, maybe the engine is just a tired old dog.