I ride a 2004 softail Deuce EFI with screaming eagle air filter, plugs and exhaust. I had power commander fitted to my bike 4 month ago, when fitted in Singapore it was dyno tested and mapped. The performance has been great but after two months I started getting popping and backfires on de acceleration. I spoke to the dealer in Singapore (I am in Malaysia 300 miles from the dealer) and he suggested adjusting the throttle zero settings from 0 to 10 between 1500 - 4000 rpm. Before changing the map settings which were arrived at from the dyno I wanted to check if anybody else has encountered this problem before and to find out what you would recommend. Many thanks - Roulph