Re: Adj fuel pressure reg. advice
Are you absolutely positive it's a fuel problem?
Yes, way too rich can lead to detonation and carbon deposits
- they glow and pre-ignite the mixture.
Too lean can do it too - fuel is a coolant, lean runs so hot
But - if your timing advance is not doing what the engine
requires, lighting the spark way too early "pings" too.
Check to make sure it starts at about the right intial point,
about 8 at idle, and advances slowly and evenly throughout
the RPM increase to about 3000 RPM. At that speed the
advance should be no more than 35 degrees tops.
A popular screw-up is to use manifold vacuum instead of ported
vacuum for the advance circuit.
If you have an advance problem and get the mixture off by
fiddling, all you accomplish is make it worse.
Easy to check it, and costs $0.