07 FX Idle speed slightly irradic??

DaveRX1

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Idle speed will drop to 1300 or so and then slowly come back up to 1700. Dosnt do it all the time, but has been more lately (warm weather).


Could this be caused by an exaust leak?? I have been hearing the occasional "pop" from the exaust on trailing throttle.

Anyone else have this issue??

P.S Sled runs great and has 3600 miles
 
I think its the belt finding its idle spot.Popping could be your manifolds cracked up by the head.
 
Manifolds cracked totally off 2 years ago @ 600 miles (now 3800) I had the manifold pipes tig welded to the flanges. When the manifolds were cracked the sled was realy loud at idle when cold and it would back fire "pop" when ever I let off the throttle. What I have now is the occasional pop and the irradic idle. I will have to pull off the tank and check the pipes, I am putting my money on bad donuts.
 


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