I recently installed SE air cleaner, V&H hi output mufflers and power duals. I used an FP3 tuner to map the ecm, since I had used 1 before. On the first ride I noticed low end power loss. I contacted VH and they say when you 1st flash the ecm, you must run 2 tanks of fuel through the bike so HD's fuel table can relearn, because it resets it every time the ecm is flashed. I was also told to set the throttle to "moderate". Seems a little better, but still not like it was with stock pipes and headers. I've only been able to go through 1 tank so far, but am very curious if V&H is blowing smoke, or will the bikes power return after tank 2? Also, they said do not use Auto Tune til after the 2nd tank, if I felt I needed to. Sounds a little off to me. Anyone else experienced this, and did it correct itself? If not, how did you correct it? Thanks

 

Any update on this? I am interested in the same setup but I am chasing torque and don't want to lose it. Thanks!

 

Not sure if this will help, but...

I have a '17 Slim. I bought a FP3 for it even before I decided to do a full Stage 1. All I wanted to do was use the map V&H has for a bone stock Softail, which is supposed to make the bike run a bit cooler, which it did.

I ended up putting Cobra 3" Slash Cut Slip-Ons on the bike, and didn't need to remap it or anything because it ran great.

When I installed the Harley Stage 1 Air Cleaner kit, I used the V&H map for generic slip-ons and a high flow A/C... and the bike ran like garbage. I didn't even wait to go through 2 tanks of gas. I flashed the map for V&H Slash Cut slip ons, and the bike ran fantastic. I haven't touch the mapping since.

 

It is likely the OP did not have enough or proper "back presure" that needed to be addressed, then remap or auto tune. As far as running tankfuls of fuel, that is overkill. They are correct, that it takes several key/on,key/off cycles for download to adapt.