I have a 2003 FLHTI with V&H Dresser Dual head pipes, Rush mufflers w/2" baffles, Stage 1 A/C, PCIII and stock ECM. I am running map#807-033 after trying many different similar ones. This map is definately the strongest and best running map. I am having a backfire still on decel only at 0% throttle and 2000 RPM's. If I give a tiny amount of throttle on decel instead of letting go of the throtte it doesn't happen. Even on a hard decel it will throttle down and hit 2000-2100 RPM's and POP! I have been told I can adjust the decel with the PCIII???
Any help would be appreciated!

 

Have you tried increasing the amount of fuel in the 0 position around the 2000 rpm mark. you can start with +10 and then increment up from there until the decel popping goes away