So I have been chasing a terrible amount of decel pop on my 2013 WG. I have a Big Sucker II intake and Bassani Road Rage exhaust. I bought the tuner from fuel moto when I bought the bike 4 years ago. I am running their base tune for now till I can get rid of the terrible decel pop before an auto tune. I currently have the quick tune decel settings a -4% fuel and +5º. Now I have only been running this long enough for the bike to get warm and for my ride into work however I notice a very loud snap/pop as soon as I roll off the throttle even when shifting. I also only get massive decel pop when down shifting and my rpm are not above 2950. Anything under that it sound like an old plane landing popping non stop. Any advise on how to get rid of this completely?

 

Did you buy from FuelMoto?

If so you can email them your tune and tell them what you want to change and they will email you a new tune back. I just did this last week.

 

I did but I dont remember my invoice # as it was 4 years ago. I will have to give them a call.

 

While you're waiting to hear back from Fuelmoto check for exhaust and intake leaks. If you have a mechanical problem no amount of tuning will fix it.

 

Here is a video we just released on using Quick Tune with your Power Vision to tune decel popping. If you need additional assistance FM customers are also welcome to use the Fuel Map Revise form on our website here and we can revise the map for you https://www.fuelmotousa.com/p-33537

 

Thanks Jamie. That's the video I used to start helping with the decel pop. I think I may be really close as its gone when the bike is cold but as soon as it gets to temp it pops a bit. I pulled a little more fuel out of it when its hotter. Not much at all, about another 2% if that, don't want to pull too much out and run it lean on decel. I am going to see if that helps. If not I will be sending in my tune to have it looked at. Also I did check for any intake or exhaust leaks but did not find any thank god.

 

I don't understand "you're running base tune until you get rid of decel pop before running autotune". What base tune?
I ran autotune first. Still had a slight pop which I adjusted after autotune.

 

I'd suggest tuning the bike and then go after decel pop, if it still there. Simple blending from
last known good cell could take care of it.

 

You have the fuel adjustment in quick tune going the wrong way. you need to add fuel on decel to cool the exhaust gas not take it away. First try fuel +5 and Spark +3. ride and check ....(didn't make much difference on my bike) if still popping then go up to Fuel +10 and Spark +5. Here Is where I began to notice a reduction. I went up to Fuel +15 and Spark +7.... most went away. do not go any more than +20 on fuel and +10 on spark... will kill your gas mileage.

 

+5 from what? I would hate not knowing what the actual number is like I do with the SE Pro Super Tuner. My decel afr (20kpa) goes from 12.2 at 6000rpm to 13.2 @ 750rpm with 12.5, 12.8, and 13.0 in between. Advance is at 45° from 7000rpm down to 3000rpm.