Autotune Unresolved Issue

[HansO]

Okay Hans. Walk me through this one. This is my understanding of the system. The PCV is a piggy back unit that over rides the stock ECU MAP. Right? The A/T unit sniffs the exhaust gases and tries to make adjustments (trim) to the MAP, so each individual bike runs to the air fuel ratios that Dynojet's MAP calls for. So. If you don't accept the trims, your bike will never run at the A/F ratios the Dynojet MAP calls for. Right or wrong?

It will run at the AFR's in the map because it is adjusting the mixture to suit the AFR's while if you acept the trims the adjustments should be be smaller, If for some reason the mixture needs are constantly changing as in my case then the trim variance are higher so not acepting the trims just allows the Auto tune free range to tune the bike to the conditions at the time.

as mentioned eslsewhere I am plannining to create another version of the map but this will have a richer AFR at the troublesome areas for better low throttle responce hopefully but I will post on that once I have had a chance to test it. this new map will hopefully create less need for the Auto Tune to make very large adjustments

 

[muleskinner]

It will run at the AFR's in the map because it is adjusting the mixture to suit the AFR's while if you acept the trims the adjustments should be be smaller, If for some reason the mixture needs are constantly changing as in my case then the trim variance are higher so not acepting the trims just allows the Auto tune free range to tune the bike to the conditions at the time.

as mentioned eslsewhere I am plannining to create another version of the map but this will have a richer AFR at the troublesome areas for better low throttle responce hopefully but I will post on that once I have had a chance to test it. this new map will hopefully create less need for the Auto Tune to make very large adjustments

Okay. Makes sense. While you are doing that, see if you can figure out why in warm weather, not cold weather, after riding along in fifth gear for a while, when I go to blip the throttle as I am down shifting, I get a back fire thought the injection bodies. It acts just like a carburetor that the accelerator pump is not working on. Does not do it on acceleration, only when blipping to downshift. Clear as mud?

I thought my PCV and A/T cured it, but it's back. Only in summer hot weather. Does not do it in cold weather riding.

 

[HansO]

Okay. Makes sense. While you are doing that, see if you can figure out why in warm weather, not cold weather, after riding along in fifth gear for a while, when I go to blip the throttle as I am down shifting, I get a back fire thought the injection bodies. It acts just like a carburetor that the accelerator pump is not working on. Does not do it on acceleration, only when blipping to downshift. Clear as mud?

I thought my PCV and A/T cured it, but it's back. Only in summer hot weather. Does not do it in cold weather riding.

Yeah my does that too but from what I have been told it may have to be tolerate as being a a rocket Quirk I. Believe might be something with the overlap on the cam timing but why it only does under certain conditions is a mystery to me

 

[motolink]

As Hans knows I fitted the PCV and A/T about amonth ago, than put Hans 20 map in the PCV, I have only done a 80km ride since fitting. The bike seem to be good except I think it might have had little jerk going up a step hill on constant throttle.
I did not do the accept the trim process, decided not to at this stage.
As soon as I have done a much longer ride I will give a better report.

 

[Georgia Boy]

It will run at the AFR's in the map because it is adjusting the mixture to suit the AFR's while if you acept the trims the adjustments should be be smaller, If for some reason the mixture needs are constantly changing as in my case then the trim variance are higher so not acepting the trims just allows the Auto tune free range to tune the bike to the conditions at the time.

as mentioned eslsewhere I am plannining to create another version of the map but this will have a richer AFR at the troublesome areas for better low throttle responce hopefully but I will post on that once I have had a chance to test it. this new map will hopefully create less need for the Auto Tune to make very large adjustments

Hans,
This helps clear some things up for me. I was wondering if the AT trims needed to be accepted to realize the full potential of the AT.....I guess not. What is the purpose of formulating a fuel map with the AT then? Is it for people who want to tune there bike and then disconnect AT?

 

[muleskinner]

Yeah my does that too but from what I have been told it may have to be tolerate as being a a rocket Quirk I. Believe might be something with the overlap on the cam timing but why it only does under certain conditions is a mystery to me

Yea mine has done it from day one totally stock. I thought the PCV and the A/T would solve it. Not!

 

[muleskinner]

Hans,
This helps clear some things up for me. I was wondering if the AT trims needed to be accepted to realize the full potential of the AT.....I guess not. What is the purpose of formulating a fuel map with the AT then? Is it for people who want to tune there bike and then disconnect AT?

Per Dynojet, once you accept the trims, the A/T unit does not have to tune such a wide spread of F/A ratios. It makes the A/T tune faster. But like Hans said, if you don't accept the trims, it will try to tune to the MAP you have installed.

Remember this. No two bikes run the same. If you put a MAP into two different bikes, neither will be the same. That's what the A/T unit does. It reads F/A mixture in the pipe and then tunes the PCV unit accordingly to match the MAP you have installed.

 

[warp9.9]

Hans have you tried using the auto tune and then after comitting the trims to the PCV commit them to the ecu and start over again this could tweak in a good base map in the ecu?

 

[HansO]

Hans have you tried using the suto tune and then after comitting the trims to the PCV commit them to the ecu and start over again this could teak in a good base map in the ecu?

must try that, it make sense.... mmmmm... but I am still going to make changes as I have noted areas that could possibly be slightly improved

 

[bagman]

Hans have you tried using the suto tune and then after comitting the trims to the PCV commit them to the ecu and start over again this could teak in a good base map in the ecu?

this iswhat I have been doing since tuneecu started importing pcv maps!