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Old 02-01-2013, 01:49 AM
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backfireing through carb at low rpm

Check your distributor to make sure that the weights are operating correctly. Check all the bushings for wear. Use a timing light with advance to check timing from idle to 4000 rpms. Use a vacuum gauge to run test on engine. Test are in the booklet that comes with vacuum gauge. Check for weak valve springs.
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