Reply to "Multiple engine problems, help needed"

panteradougMember

Look at the pvc system. Disconnect and plug it at the intake manifold and see if it helps.

FYI the color of the plugs should be a dark brown-grey on the ceramic insulator an the tips should be clean.

This could all be ignition related and you could have a failing ignition system.

The engine vacuum definately should respond to increased advance. The difference would be something like 14-15 in-mg at 10-12 degrees and about 18 at 16.

An outside possibilaty is that the harmonic dampener has failed and slipped and you are reading the timing inaccurately.

A 40 year old dampener COULD fail on you without you knowing it.

7/9/087:47 PM

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