120r tuning

[baker]

 I finished doing some changes to my 120, build is 120r 12:1 compression, S&S 640, AV&V springs, Bassani 2 into 1, I down loaded base map 176NLX007 from my super tunersoftware, (07-10 Dyna RX )  the bike runs real good and makes awsome power, problem is, the engine starts good when it's cold, but after it's warmed up and I go to start it again I have to roll the throttle wide open to get it started, Iv'e changed the timing and cranking fuel around trying to solve the starting problem, but any change I make only makes it worse, so now I'm back to the original settings of the base map, and still have the starting problem, I have the acr's wired into the starter relay, could both acr's being wide open during cranking cause a starting problem? I'm stumped with the starting problem and don't know what to do to fix it.

[rigidthumper]

Yes.  Had that same issue try disconnecting just one ACR and see if it gets better. 

[baker]

Thanks, I'll give that a try tomorrow and see how it does, I seen a simular thread some time back about a starting issue with acr's wired this way but couldn't find it and was a little suspicious that that could be causing my problem

[rigidthumper]

The ECM can control the ACRs if wired up- its available in that map, why not just get the harness and wire them according to instructions? One less issue, IMO

[baker]

rigidthumper, you were right about the acr's, I unpluged the front and the engine fires right up, hot or cold. I will have to order a new harness to wire it in properly as the one I used was from a wrecked bike and the ends had been cut off it. Thanks.

[FSG]

Under ECM control both ACRs are pulsed rather than held open, BUT if hard-wiring them to the starter only one need to be operated and as has been posted before wire in the Front ACR on Cylinder 2 so that the ECM sees the Crank Slowing as Cylinder 1 comes up on compression.

[baker]

ok thanks FSG, I'll plug the front back in and unplug the rear.

[HD/Wrench]

Under ECM control both ACRs are pulsed rather than held open, BUT if hard-wiring them to the starter only one need to be operated and as has been posted before wire in the Front ACR on Cylinder 2 so that the ECM sees the Crank Slowing as Cylinder 1 comes up on compression.

The ECM is looking for a RPM under cranking, the ACR is very cool in that feature as it will change % of bleed for that engine. . I have to wonder though is there is a tune issue as well.

[1931jamesw]

Under ECM control both ACRs are pulsed rather than held open, BUT if hard-wiring them to the starter only one need to be operated and as has been posted before wire in the Front ACR on Cylinder 2 so that the ECM sees the Crank Slowing as Cylinder 1 comes up on compression.

The ECM is looking for a RPM under cranking, the ACR is very cool in that feature as it will change % of bleed for that engine. . I have to wonder though is there is a tune issue as well.

Have to agree. Sounds like cranking fuel, crank steps or crank to run steps tables may need some work. Even warmup enrichment could be a possible issue.