Video - More Fuel = Less Decel Pop??? WRONG!

[DK Custom Products]

 

[David792]

Decel pop at high altitude

Riding a 2018 107 with a stage 2 tuned with a SE tuner. I live at 4700 feet and have tuned my M8 at this elevation I rarely experience any "noticeable" deceleration pop.

Took a trip up to 8800 feet where it was 30 degrees overnight and topped out at about 65 degrees. I experienced quite a bit of decel pop. Quite a bit on downhill runs, which I could mitigate by giving it just a bit of throttle.

I'm sure this is normal but... would the motor run richer at the higher elevation? Does my ECM compensate for elevation changes?

Thanks for any ideas on this.

 

[Jack Klarich]

Riding a 2018 107 with a stage 2 tuned with a SE tuner. I live at 4700 feet and have tuned my M8 at this elevation I rarely experience any "noticeable" deceleration pop.

Took a trip up to 8800 feet where it was 30 degrees overnight and topped out at about 65 degrees. I experienced quite a bit of decel pop. Quite a bit on downhill runs, which I could mitigate by giving it just a bit of throttle.

I'm sure this is normal but... would the motor run richer at the higher elevation? Does my ECM compensate for elevation changes?

Thanks for any ideas on this.

Yes it runs richer, there is less air @ higher altitudes, your ECM should be able to compensate for this

 

[David792]

Yes it runs richer, there is less air @ higher altitudes, your ECM should be able to compensate for this

Thank you for the response. That's what I thought... richer. I thought that "leaner" caused the pop. It was noticeable and of course it went away when I dropped down to about 6,000 ft and totally gone back home at 4700 ft. It might be possible that using the SE tuner somehow overrides the ECMs ability to compensate. (that's just a guess). Anyway, no harm done since it all happens in the muffler.