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Help!

AKBullDog

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2:32 AM
Joined
Jul 27, 2013
Messages
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Location
Anchorage, ak
I have a 1965 Plymouth Belveder. It has the original 383 block, but that is about it. Recently, it has started to sputter, cutout, of miss fire when I am at high RPMs. It runs very well off the line, but when the motor hits higher RPMs it just starts to sputter. The motor has about 1500 miles on it. Lunati cam, stealth heads, Keith Black pistons, etc. I am afraid that it is a flat lobe on the cam. Any ideas?? HELP!!!!!!!!!!!!!
 
If you have a points style ignition ,either replace them or check the gap. If electronic,check gap. Either way may sure the timing is around 35 degrees at 3500 rpm with vac advance unhooked and plugged at the carb.
 
Flat cam lobe would miss all the time, not just at high rpm. Check fuel filter, sparkplugs, points (if you have them) and wires. Suppression wires should be about 5,000 ohms per foot. Burned plug boots, distributor cap and rotor contacts, etc. Good luck...
 
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