lean pop...I think
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
That popping usually means a lean condition. Since it's one side only I would suspect an air leak somewhere...maybe the intake is sucking air from around the gasket and richening one or more cylinders.
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Joined: Oct 2004
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From: Cape Cod, Mass.
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In addition to the info others have provided, I would check the operation of your heat riser. If it gets stuck up or frozen it can impede the exhaust flow.
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
Possibly a valve
Since popping is usually caused by unburnt fuel igniting in the exhaust system, I would look for either a valve, ignition wire, or spark plug problem. If a plug is fouled or ignition wire shorted on that side of the engine, then it may not be burning as efficiently as it should. Likewise, a valve not seating properly on that side could also cause the same problem.
I would think that a carbeuration problem would be independent of which side the popping occurred and would likely pop from both sides. Hope this info helps and good luck!
I would think that a carbeuration problem would be independent of which side the popping occurred and would likely pop from both sides. Hope this info helps and good luck!
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
If you suspect a valve might not be seating properly, take off your air cleaner and with the engine running spray a spritz of water into the top of the carb. The water will vaporize into steam, and break away carbon buildups that might be keeping a valve from seating properly. The water won't hurt anything if it's done in moderation. I did this once and was amazed at all the black crap that came spitting out the exhaust. A white cloth confirmed the discharge.
