Re: backfire/missing when cold

Posted by shinyribs on Oct 05, 2011; 6:04pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/backfire-missing-when-cold-tp3397125p3397382.html

Do you recall if the backfire sounded like it was thru the carbs or thru the pipes.Im not 100% sure,but it sounds like timing perhaps.If it is timing it is probably the same thing that causes it to start slow.Usually when you have to keep holding the starter button,waiting for it to "catch up"so to speak,your timing is low or retarded.Retarded timing may also backfire thru the pipes since the engine is trying to fire with the exhaust valves open.Not being able to replicate it with load suggests to me it could be the timing advance is stuck.If it were me i would check on the timing advance.Of course...if you follow my advice that may cause you problems all by itself.Good luck