Grand Prix 500
Main Motorcycle: 2012 Scrambler
Join Date: Dec 2011
Location: San Diego
Popping decel related to TPS position
I am starting a new thread because I have narrowed down the problem I am having. Take a look at my signature to see what my mods are.
Here was my problem: I love my new tune by TTP (Tune #2) -- much more power, no jerking etc -- but I was experiencing popping on decel (something I did not experience prior to removing the AI, and simply using a marble in the hose as a temporary solution).
Mike has been helping me a lot via email. I checked and sealed my Arrow exhaust for leaks, but still got popping. I also dicked around with the idle speed, and still popping. I adjusted the TPS from .65 down to .62 in TuneECU and the popping on decel got worse.
So, I tried adjusting the TPS up to .66 and yes, the popping stopped! The exhaust smells a bit richer now, but no popping whatsoever.
Of course, there is another problem now. With the TPS set at .66, the choke knob (which has two settings, medium and all the way out) is a bit sketchy. Moving the knob in and out seems to give me different RPMs every time time I move it.
I am going to let the bike cool down now, keep the TPS at .66 and see what happens after one more adaptation reset cycle. I will let you know what happens.
Current: 2012 Scrambler, Bitubo forks, YSS shocks, Arrow 2-to-1, 33mm DB killer, TTP tune #4, Breathe, DNA filter; O2, AI, Airbox baffle, EVAP removed, Up-N-Over, Pivot Pegs, Ventura rack.
Past: '83 Honda XR500; '84 Honda XL600; '86 Yamaha XT350
Last edited by tvscum; 12-08-2012 at 02:11 AM.
Reason: corrected numerous typos