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Old 02-14-2010, 10:50 PM
P.H. 88 P.H. 88 is offline
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Originally Posted by Frisco
This reply, posted above, has the best questions that need to be answered before any helpful info can be posted.

This post from Blazin72, has another excellent question that needs to be answered before helpful info can be posted.

To the best of my knowledge an '81 Chevy was equipped with a computer controlled HEI. Setting the timing with a computer controlled HEI is not done the same way as a non-computer controlled HEI.

To the OP. Look at the HEI you have. Does it have a vacuum advance cannister attached? If it does, then the HEI is for a non-computer controlled system. If it does not, then the HEI must be run with the computer to perform correctly.

More info is needed.
it is a non comp
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