Re: Misfire mystery
Im back...
Whats been done so far:
New valves, proper lash, and lapped in
New valve springs
New head and gasket
New coil
New ignition switch
New wiring (already done previously)
Fresh fuel
Tried two different carburetors
Tried two different distributors
New intake/exhaust gaskets
Ground strap to body and to transmission
Continuity from ground to distributor body
Still have an intermittent misfire....not consistent like a mechanical issue (valve or worn cam)
No backfires, revs up good, starts easy
Just seems like ignition related, its not cyclical, can be one misfire or several in a row. Spark plugs look the same on all four cylinders.
I can ground out the spark plug straps and hear a change on each cylinder.
GAV doesn't seem to have an effect. Vacuum gauge shows a dip at each misfire.
Valves appeared to open and close the same amount relative to each other.
(original lifters, non adjustable)
60 PSI compression on all cylinders
New Ammeter
I do have a flathead V8......I threatened my car with it.....didnt seem to help either.
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