lost fire!!!

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Dec 15, 2011 | 09:11 AM

inkslinger73

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From: saint john ,nb,canada

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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Dec 15, 2011 | 12:13 PM

blackbear

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It could be a bad spark plug wire or a bad coil.

Dec 15, 2011 | 04:02 PM

bobnehoc

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From: Millsboro Delaware

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.....

Dec 15, 2011 | 05:50 PM

inkslinger73

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From: saint john ,nb,canada

thanks i was figuring it was a coil problem.

Dec 18, 2011 | 02:26 PM

inkslinger73

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From: saint john ,nb,canada

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.