Autotune thoughts
Thread Starter
|
Banned
Joined: Jan 2012
Posts: 3,098
Likes: 474
From: Location location.
Autotune thoughts
I've seen a few videos of guys having issues with the auto tune function on some of the after market tuners with that function.
The one commonality I see with the guys having issues is they have all started the auto function with cold motors or just a mile or two riding.These guys ride for a short time and then load the auto tune and then have problems taking off from the lights and stuff , they nearly all go back to the canned map.
Most of the videos that had issues had a few stop start at traffic lights or getting going and then some open road
I'm wondering if the auto tune when down loaded to the ECU is logging to the bike in an enrichened state as the bike/bikes had not warmed up enough.
The one commonality I see with the guys having issues is they have all started the auto function with cold motors or just a mile or two riding.These guys ride for a short time and then load the auto tune and then have problems taking off from the lights and stuff , they nearly all go back to the canned map.
Most of the videos that had issues had a few stop start at traffic lights or getting going and then some open road
I'm wondering if the auto tune when down loaded to the ECU is logging to the bike in an enrichened state as the bike/bikes had not warmed up enough.
Cruiser
Joined: Sep 2009
Posts: 135
Likes: 2
From: S/E Michigan
Had a FP3 on my 16 FLHXS until a guy crossed jumper cables on me and burnt my ecm and FP3 up, Now have a PV2 and am having problems on takeoff (stumbling a little bit), You have me wondering about auto tune now. I'll get bike hot and then auto tune with a lot of stops and starts and see if that helps.
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Depends on the system. Some have a set engine temp that needs to be reached before auto tune data is collected. Some allow this to be user settable.
Some of these won't allow data collection until warmup fuel is out of the equation. Some don't. Some are set up with engine temp and time.
The stock ECM calibration doesn't allow close loop feed back to have input until engine reaches a certain temp and other things are in line. I follow these guide lines. So, I believe some of these problems people have are self induced.
Years ago I was taught to not even collect O2 data for an open loop tune until these tables are out of the way and engine is at least 180. This has worked quit well for me and do the same even if I am collecting wide band data and I am feeding that back into a tuning unit. I'm still following the simple recipe taught to me by Doc.
Some of these won't allow data collection until warmup fuel is out of the equation. Some don't. Some are set up with engine temp and time.
The stock ECM calibration doesn't allow close loop feed back to have input until engine reaches a certain temp and other things are in line. I follow these guide lines. So, I believe some of these problems people have are self induced.
Years ago I was taught to not even collect O2 data for an open loop tune until these tables are out of the way and engine is at least 180. This has worked quit well for me and do the same even if I am collecting wide band data and I am feeding that back into a tuning unit. I'm still following the simple recipe taught to me by Doc.
Road Master
Joined: Feb 2007
Posts: 908
Likes: 121
From: VA
Interesting comments...I ran auto on my PV for 5 days straight, then exited AT, loaded the learned values and it runs great now.
Yes, with AT on and cold, it did stumbled a couple times, but not once after loading...
I may try warming it up, then starting AT and do a run, or 2
thanks!!
Yes, with AT on and cold, it did stumbled a couple times, but not once after loading...
I may try warming it up, then starting AT and do a run, or 2
thanks!!
Grand HDF Member
Joined: May 2014
Posts: 3,826
Likes: 1,170
From: florida
somehwere in the autotune settings you can set and engine temp or run time adjustment for when the autotune begins,,,,,i usually warn the bike up first,,,then do the datalog,,,then flash. i dont do lots of rides in autotune,,,had data get corrupted and lost.
m
m
Seasoned HDF Member
Joined: Aug 2017
Posts: 7,323
Likes: 11,760
From: Omaha,NE
The automatically-adjusted areas of the calibration only affect the closed-loop operation. I believe they are all programmed that way. Therefore, the bike should be warmed up before starting the autotune feature. You would then want to complete a full drive-cycle. This includes normal stop-and-go city riding with some idling, on-ramp acceleration, highway cruise, and wide-open acceleration. I did this for two full cycles with my PV-2 and it really got things where they needed to be.
Elite HDF Member
Joined: Jul 2010
Posts: 3,830
Likes: 302
From: Lorain Ohio
I asked about this before...I have a FP3 an the advise I got was when you auto tune it it will run rough at times...also they said ride it like you stole it....get it up in the rpm's during the auto tune session.
Trending Topics
Thread Starter
|
Banned
Joined: Jan 2012
Posts: 3,098
Likes: 474
From: Location location.
This post was a just a thought bubble deal , nearly all the videos I saw the guy programmed the auto tune function and then started the bike and rode away , with a few traffic lights or intersections then open road. All these guys had issues and went back to the canned map.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Aug 2017
Posts: 7,323
Likes: 11,760
From: Omaha,NE
I finally got around to Autotuning mine this weekend. Here's what I did, and it worked perfectly:
- Bike was already warm after riding home from work
- Connected PV, went to AT section, selected the tune currently in my ECM (set up for my exhaust/intake combo)
- After enabling AT, it loaded the "enabled" tune to the ECM
- Key off 10 seconds
- Started the bike, started AT
- Rode stop-and-go, normal city riding, normal acceleration
- Wide open throttle on-ramp to interstate
- Cruised @ 65 MPH, but altered gear selection while maintaining speed to change RPM zones
- Exit interstate to highway
- Slow progression through gears under medium acceleration to 60 MPH
- Downshifted and held at 6000 RPM for short time, then 5K, 4K, etc.
- Pulled into gas station and imported the logged data
- Loaded revised tune into ECM
- Repeated the above steps on the trip home