DECEL pops getting worse...
Road Captain
Joined: Nov 2010
Posts: 502
Likes: 0
From: Roads of Idaho
Mine does the same deal especially when I go from WFO and whack it off to nothing and that is when it does it. Does it more since my dyno tune sooo?? It is kinda cool sounding to me 
I believe it (the pop) is extra fuel burning off outside of the cylinder which also keeps the motor running cooler...
What I do know is my bike was running pretty good prior to the dyno and now it is running as well as any I have ever ridden... and if this pop means that it isn't tuned right still then I guess that would be news to me, maybe fuel economy can be improved?? That isn't as critical to me as performance in HP and Tq. as well as healthy temps for the motor to live a long, high performing life.
Maybe someone who has more knowledge?? Since NASCAR went to fuel injection however, I don't see the exhaust flaming out the pipes when they are off the gas in the corner and when they had carbs they used to... So maybe there is more to this as asked by the OP??
I believe it (the pop) is extra fuel burning off outside of the cylinder which also keeps the motor running cooler...What I do know is my bike was running pretty good prior to the dyno and now it is running as well as any I have ever ridden... and if this pop means that it isn't tuned right still then I guess that would be news to me, maybe fuel economy can be improved?? That isn't as critical to me as performance in HP and Tq. as well as healthy temps for the motor to live a long, high performing life.
Maybe someone who has more knowledge?? Since NASCAR went to fuel injection however, I don't see the exhaust flaming out the pipes when they are off the gas in the corner and when they had carbs they used to... So maybe there is more to this as asked by the OP??
It's either an exhaust leak or it needs more fuel at 0 throttle position
Road Warrior
Joined: Jun 2007
Posts: 1,523
Likes: 312
From: Out of Commiefornia!
Typically it needs more fuel at decel in the ranges it is acting up... simple to do with TTS and TMax, but it has been so long since I've had the PC III I can't remember if there were specific settings for it there. On some it is called Decel Enleanment.
Could try giving Jamie a call at FuelMoto - he's got a ton of experience with the Power Commanders and may be willing to give some assistance, else try working directly with Power Commander. They will be able to help dial it in.
Roger
Could try giving Jamie a call at FuelMoto - he's got a ton of experience with the Power Commanders and may be willing to give some assistance, else try working directly with Power Commander. They will be able to help dial it in.
Roger
Thread Starter
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Cruiser
Joined: Oct 2010
Posts: 165
Likes: 0
More fuel at 0 position could be the culprit. I don't have enough experience with the PCIII to add more fuel at 0 in those ranges.
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
When I had the 1k service done I had the dealer do the Stg1 and dyno with SERT..
I had a lot of decell popping and even a Kaboom every so often.
They redid the dyno that didn't help much, I rode it a little cause they said it would self tune it out, NOT,, I then called Rush and the TECH told me it sound like air leaks and he told me how to check for them..
Yeppers I had daylight at 5 of 8 slots where the clamps tighten..
After resealing the pipes and another Dyno tweak, the tuner got 90% of the popping out and no more KaBooms...
now I get the Jack brake sound on decelerations, with a gurggle at some Rpm's..
The retunes was all on there dime.
If I'd just had the canned map I am not sure how much diff it'd made, cause even after they resealed the muffs I still had some decell pop.
..
Last edited by oct1949; Mar 22, 2012 at 07:40 AM. Reason: rewrote better understanding
Elite HDF Member
Joined: Jul 2007
Posts: 3,891
Likes: 54
From: Mansfield, MA
read the OP again..... Clearly he got a Stage 1 download from Harley.. My question, which was answered by the OP was whether the POWER COMMANDER was canned or custom...
cap letters in the OP.
DYNAJET PC III usb
read the whole thread before jumping in.
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Joe Kucinski
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
OK,, OK I screwed up Bad on this one, I quit reading tooooo soon..
When U said canned down load I though U meant a HD down load to Ur EMc....
MY BAD...... really sorry for not reading better...
And I take it all back...
Now a whole new ball game...
If U bought the PC111 from Fuel MOTO, give Him a call and have him give U a new download for Ur set up..
HOPEfully it'll stop the decell pop..
29 lashes to me for not reading better.
.
When U said canned down load I though U meant a HD down load to Ur EMc....
MY BAD...... really sorry for not reading better...
And I take it all back...
Now a whole new ball game...
If U bought the PC111 from Fuel MOTO, give Him a call and have him give U a new download for Ur set up..
HOPEfully it'll stop the decell pop..
29 lashes to me for not reading better.
.
Last edited by oct1949; Mar 22, 2012 at 07:41 AM.