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Old 10-11-2018, 10:10 AM   #14
Senior Member
Join Date: Jun 2010
Posts: 663
Default Re: Terriable backfiring

It is also possible that you have a cracked distributor body or a brake-down in the insulation between the leads in the body. A number of years ago some repo bodies were defective and would crack near where the #4 internal lead went past the #3 plug lead causing the a short between the #3 and #4. This short is very visible if you run at an idle in a dark garage, check along the edges of the body near where the plug leads are close to the body. Try another distributor body. After I found out about this problem we had a tune-up clinic and I found about 1/3 of our clubs cars had bad distributor bodies.
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