Thread: vacuum lines
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Old 06-18-2011, 01:43 AM   #16
Corts60
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Join Date: Jun 2008
Location: Holland, MI
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Re: vacuum lines
Yes, timing is causing the issue. Do you have a timing light?

If so, hook that bad boy up and set your timing to around 6-8 degrees. That should take care of the backfiring issue. Then move on back to the carb problem.
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