I have a 2006 ultraclassic with a power commander on it the issue is intermittent I ride for about 30 minutes let bike sit for 10 to 20 minutes when I try to start it just cranks dry not even trying to fire I hear fuel pump cycle I checked I do have spark new plugs on it if I drop gas in cylinders it will fire that fuel out then just dry cranking after that when it cools down it fires right up no problem

 

I'm assuming your ECM is not throwing any codes then? frustrating for sure - on my 2005 Dyna, I removed my Power Commander completely, reflashed to Stage 1 as opposed to installing a SERT, and it cleared up this same issue - alternately it could be a faulty IAT sensor (5) or sticking Idle/Air Control Module(9) but these issues are usually accompanied with an error code. Just throwing it out there.

 

Ignition problem related to that old power commander. BTW, a period is your friend.

 

If its not the Power Commander look into known issues with the fuel pump bracket. Its plastic and cracks, not letting pressure build. You may hear it spraying if you pull the gas cap.

 

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@ thoughts come to mind.

1) Battery could just weak enough (or starter could be tired drawing too many amps when cranking) to cause low enough amperage or voltage for ign so motor cranks but wont fire.

I have run into this very issue few times over the yrs wrenching bikes so i know it can & does in fact happen time to time.

Quick test for that would be to when you get home and shut bike off hot to quickly hook up jumper cables to it to see if it fires up NP hot,if yes its very a weak battery & or tired starter drawing too many amps or a mixture of both collectively causing the problem of not enough amps/volts left when cranking to properly power the ign module or coil.

2) Sometimes when theres an issue with an electrical item on a vehicle it will fail when it get overheated like for example when you 1st shut bike down and it overheats the ign moduel or coil making something electrical expand enough to cause an OPEN disconnecting pwr to it etc.

But when it cools off enough 20-30 mins later the ign module or coil works again till it overheats again making it temporarily fail again cycling like that back & forth.

3) Long shot, maybe there's a poor pwr connection on ign module or coil .

Good luck.

Scott