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Old 08-24-2021, 07:14 PM   #14
Synchro909
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Join Date: Jun 2014
Location: Melbourne, Australia
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Default Re: Roadster Backfiring

All the symptoms of a leak in the intake tract somewhere. Something that hasn't been mentioned is the rotor button. They are known to track to earth and you can't see where. Try a known good one. Also check you are not getting the infamous Model A no 3/4 cross fire.
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