Severe engine miss at 3000RPM

TMAXXjj · 07-09-2003, 07:57 PM

I'm running the Duraspark type distributor. Does anyone know what the correct distance between the pickup and the star in the distributor? I tried regapping the plugs to .055 but still has the same miss on most of the cylinders. The engine has 17-18 hg's of vacuum at idle warm and 140-150psi of compression cold. Is it possible that the timing chain is off by one tooth? It has a dynagear double roller timing chain on it. Righ now it has midlength headers and no exhaust hooked up but that shouldn't make a difference right? This afternoon I swapped the carburator from my daily driver onto the car (650cfm holley vac sec.) and it still messes up in the same place.

I've already had enough bad luck with mallory distributors. We had one with dual points and without vacuum advance and you could put a timing light on it and watch the timing jump around 4-5 degrees. The points were right but it still jumped. Replaced with stock distributor and fixed the problems with that motor.

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07-09-2003, 07:57 PM	#1
TMAXXjj Registered Member Join Date: Feb 2003 Location: Bowling Green, KY Posts: 11	I'm running the Duraspark type distributor. Does anyone know what the correct distance between the pickup and the star in the distributor? I tried regapping the plugs to .055 but still has the same miss on most of the cylinders. The engine has 17-18 hg's of vacuum at idle warm and 140-150psi of compression cold. Is it possible that the timing chain is off by one tooth? It has a dynagear double roller timing chain on it. Righ now it has midlength headers and no exhaust hooked up but that shouldn't make a difference right? This afternoon I swapped the carburator from my daily driver onto the car (650cfm holley vac sec.) and it still messes up in the same place. I've already had enough bad luck with mallory distributors. We had one with dual points and without vacuum advance and you could put a timing light on it and watch the timing jump around 4-5 degrees. The points were right but it still jumped. Replaced with stock distributor and fixed the problems with that motor.