Hi guys, problem #967! Here it is ... I just tuned my 72 240 su's with the ztherapy video, and wow what a differance. It ran perfect, for 2 day's:cry: . For what ever reason it started ideling really rough, I tryed adjusting the carbs but nothing I did helped. It seemed like it was an electrical problem so I check my plugs they were all brown except for the #2 plug it was sutty, so I assume that its rich or the plug wasnt fireing. So just to make sure I replace the plugs, and it still ran like crap! So I check the wire ( I held the plug to the block), it works. Now here is where it gets weird, It runs great when I get on the gas:ermm: It drives great (as far as I can tell, cause I dont have anything to compair it to) untill I come to a stop then the rough idel starts, ... gas = smooth, idel= rough. Could it be the electric distributor? Could it be a blown head gasket? could it be a bent valve? Im just guessing, I have no idea where to go from here? Help!

P.S. I just rebuilt the engine 8 months ago, new head,bearings, everything.

Matt-

check the chokes sounds like one in sticking. reach under the carb and push on the mixture adjustment , see if it snaps up. Check the fuel line there that runs from the float bowl to the adjustment , the grose jet, if the hose is stiff or brittle replace it . That will cause the choke to stick becauses it wedges it to one side. The local parts store fuel line is too stiff , and DO NOT USE VACUME LINE , it will not handel the fuel , and the manifold is right there. You might try a Harley shop . For sure Ztherapy has the right stuff. :classic: