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lost fire!!!

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Old Dec 15, 2011 | 09:11 AM
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From: saint john ,nb,canada
Default lost fire!!!
I have a 86 fxr was workin excellent.Now it keep losing fire on the rear cylinder and than kicks back in and so on.tried a few new pluga same thing.I havent changed or touched anything before this issue. Any help appreciated.
 
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Old Dec 15, 2011 | 12:13 PM
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It could be a bad spark plug wire or a bad coil.
 
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Old Dec 15, 2011 | 04:02 PM
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It could be a bad coil as previously stated or wires. I would also vedify that you have good compression in the cylinder as well. Lastly it could be a fuel problem. Check the carb and intake manifold for leaks.....
 
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Old Dec 15, 2011 | 05:50 PM
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From: saint john ,nb,canada
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thanks i was figuring it was a coil problem.
 
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Old Dec 18, 2011 | 02:26 PM
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From: saint john ,nb,canada
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No coil problem as I tried a brand new one and still same.I can't seem to detect any intake leaks.Found a exhaust leak on same cylinder.compression test between 120 and 125 psi per cylinder.beats me.Has a 2-1 header and is back firing often not constantly but often.
 
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