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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through September 10, 2008 » Rear Cylinder not firing! « Previous Next »

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Aodh69
Posted on Thursday, July 31, 2008 - 02:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Ok I have a 1998 S3T with about 27k on it, just recently it started running rough then the rear cylinder stopped firing all together. I have replaced the plugs, plug wires and the coil, but still not getting combustion in the rear cylinder! Should I go ahead and replace the ignition module or is there something else I should do?
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Sparky
Posted on Thursday, July 31, 2008 - 03:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Pull the spark plugs and do a compression check on both cylinders. The readings should be approximately the same for both jugs.

If the compression check is OK, then test for spark at both plugs while the spark plugs are removed and grounded against the engine. There should be the equal amount of spark from both plugs.
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Aodh69
Posted on Tuesday, August 05, 2008 - 10:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Ok discovered it wasn't electrical at all, was the manifold intake seals!
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