Power Vision Information Thread
Road Captain
Joined: Oct 2011
Posts: 738
Likes: 29
From: Smithfield, VA
Confusion Re:Decel Popping
I'm not having much reducing my minor but noticable decel popping. I've tried reducing Decel Enleanment by about 20% which had no noticable effect. Also richened up my 20kpa column by about .5 AFR to about 12.5 which didn't seem to make any difference either. Went the other way and leaned it up by .5 to 13.5 AFR and did notice that it got worse. I even richened up my 27kpa column to see if that would make any difference (starting with original 20kpa values from FM tune) and didn't really notice any change either.
Any suggestions? How far can I richen the 20kpa column? I would think 12.5 should be enough.
Any suggestions? How far can I richen the 20kpa column? I would think 12.5 should be enough.
Road Warrior
Joined: Jan 2008
Posts: 1,549
Likes: 18
From: Upstate SC
New 8/8/12 BETA version available
Last edited by JustDennis; Aug 10, 2012 at 05:55 AM.
Road Warrior
Joined: Jan 2008
Posts: 1,549
Likes: 18
From: Upstate SC
Road Warrior
Joined: Jan 2008
Posts: 1,549
Likes: 18
From: Upstate SC
I'm not having much reducing my minor but noticable decel popping. I've tried reducing Decel Enleanment by about 20% which had no noticable effect. Also richened up my 20kpa column by about .5 AFR to about 12.5 which didn't seem to make any difference either. Went the other way and leaned it up by .5 to 13.5 AFR and did notice that it got worse. I even richened up my 27kpa column to see if that would make any difference (starting with original 20kpa values from FM tune) and didn't really notice any change either.
Any suggestions? How far can I richen the 20kpa column? I would think 12.5 should be enough.
Any suggestions? How far can I richen the 20kpa column? I would think 12.5 should be enough.
Tourer
Joined: Jun 2011
Posts: 275
Likes: 0
From: Charlotte, NC
So for now Im just working on getting the VE tables right, then I'll do spark after that.
And yes, autotune will only edit what you tell it to. If you don't want any spark learning to happen, go into the autotune settings (on the pv) and make sure "max spark learn" is set to 0.00. This way it will only update the VE tables.
Road Captain
Joined: Oct 2011
Posts: 738
Likes: 29
From: Smithfield, VA
You have done the right things and in my experience 12.5 would normally stop the decel popping. You should target the RPM area where the popping is occurring. Of course, it you have another problem that is not fuel related, you are only masking the issue. The biggest cause of decel popping is exhaust leaks. Be sure to check all clamps and if you have changed exhausts, be sure to use new gaskets.
Again, this is minor and is not loud popping or backfiring but how low an AFR would be safe for testing in the affected RPM range?
in the beta vesrion, my gear selection doesnt display a number,, im also thinking when i select datalog screen and i usually monitot knock F & R it also doesnt display when a knock happens... have a 2011 FLHX.... i had an occasional knock but none since i upgrade to beta version.. will update the PV now with the latest version and try it out...
when i tried to Data log, i entered code 319247 and then selected auto tune, basic,selected my tune, then datalog, i got a ECU error.. i stopped there.. didnt want to mess anything up on my ECM... bike was running when i did this...
when i tried to Data log, i entered code 319247 and then selected auto tune, basic,selected my tune, then datalog, i got a ECU error.. i stopped there.. didnt want to mess anything up on my ECM... bike was running when i did this...
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Road Master
Joined: Jun 2006
Posts: 871
Likes: 7
From: Manchester, NH
Intermediate
Joined: Jul 2012
Posts: 37
Likes: 0
From: Chico, Ca
in the beta vesrion, my gear selection doesnt display a number,, im also thinking when i select datalog screen and i usually monitot knock F & R it also doesnt display when a knock happens... have a 2011 FLHX.... i had an occasional knock but none since i upgrade to beta version.. will update the PV now with the latest version and try it out...
when i tried to Data log, i entered code 319247 and then selected auto tune, basic,selected my tune, then datalog, i got a ECU error.. i stopped there.. didnt want to mess anything up on my ECM... bike was running when i did this...
when i tried to Data log, i entered code 319247 and then selected auto tune, basic,selected my tune, then datalog, i got a ECU error.. i stopped there.. didnt want to mess anything up on my ECM... bike was running when i did this...