Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

lapoltba · Feb 8, 2019

I flashed my truck last night and observed the same thing after using Techstream to reset learned values and letting the truck idle.

PhogDog · Feb 8, 2019

bshammer0 said: ↑

After the long (too long) discussion around clearing learned values / battery disconnects, I was really curious how accurate the service manual was. It is accurate, based on my testing. I disconnected my negative battery terminal for about 30 minutes, then before starting up the truck, I connected OBD fusion and checked the learned values for thinks like Knock Correction Learn Value and the multiple A/F / idle learned values. The later should reset to 0 after a true ECU reset, whereas the Knock Correction Learn Value should reset to 14deg after resetting the ECU. What I found was that, somewhat randomly the best I could tell, some but not all of those learned values truly reset. So this morning I hooked up TechStream and accessed the Engine > Utility and cleared learned values then took another look at the stored learned values. The indeed were all reset to zero with the knock correction learn set back to 14 (I can tell this b/c with 93 in the tank, it generally stays in the high 20s vs. 14 which would be the baseline for 87 octane).

I'm back on the TSB for now awaiting the next 1.05 batch of updates / flash manager, but I was struggling b/c my truck just hadn't been running quite "right" but I couldn't put my finger on it. Seems that even with a battery disconnect there were some ECU learned values that could have been causing some "confusion" perhaps. The vibes that had all but gone away quieted back down after this so that's worth the time to me!

I know one thing, for future flashes I'll make sure to manually clear all learning in TechStream and follow the idle learn procedure (start truck, after it is WARM let idle for 5 minutes, then drive slowly - but >6 mph, stop and idle for 20 seconds, drive slowly for a short distance, stop and idle in D for 20 seconds, then take it really easy for a few minutes to let ignition stuff settle in.
Click to expand...

What do you recommend for those that don't have techstream?

TEXAS BS · Feb 8, 2019

bshammer0 said: ↑

After the long (too long) discussion around clearing learned values / battery disconnects, I was really curious how accurate the service manual was. It is accurate, based on my testing. I disconnected my negative battery terminal for about 30 minutes, then before starting up the truck, I connected OBD fusion and checked the learned values for thinks like Knock Correction Learn Value and the multiple A/F / idle learned values. The later should reset to 0 after a true ECU reset, whereas the Knock Correction Learn Value should reset to 14deg after resetting the ECU. What I found was that, somewhat randomly the best I could tell, some but not all of those learned values truly reset. So this morning I hooked up TechStream and accessed the Engine > Utility and cleared learned values then took another look at the stored learned values. The indeed were all reset to zero with the knock correction learn set back to 14 (I can tell this b/c with 93 in the tank, it generally stays in the high 20s vs. 14 which would be the baseline for 87 octane).

I'm back on the TSB for now awaiting the next 1.05 batch of updates / flash manager, but I was struggling b/c my truck just hadn't been running quite "right" but I couldn't put my finger on it. Seems that even with a battery disconnect there were some ECU learned values that could have been causing some "confusion" perhaps. The vibes that had all but gone away quieted back down after this so that's worth the time to me!

I know one thing, for future flashes I'll make sure to manually clear all learning in TechStream and follow the idle learn procedure (start truck, after it is WARM let idle for 5 minutes, then drive slowly - but >6 mph, stop and idle for 20 seconds, drive slowly for a short distance, stop and idle in D for 20 seconds, then take it really easy for a few minutes to let ignition stuff settle in.
Click to expand...

Do you have a pdf of that section in the service manual?

Taco16LB · Feb 8, 2019

TEXAS BS said: ↑

Do you have a pdf of that section in the service manual?
Click to expand...

Post 38461
https://www.tacomaworld.com/threads/2016-toyota-tacoma-v6-ecu-tuning-alpha-release.495735/page-1924

TEXAS BS · Feb 8, 2019

Taco16LB said: ↑

Post 38461
https://www.tacomaworld.com/threads/2016-toyota-tacoma-v6-ecu-tuning-alpha-release.495735/page-1924
Click to expand...

Kclamer · Feb 8, 2019

Love the first page update. Thank you

MOC221_ · Feb 8, 2019

bshammer0 said: ↑

After the long (too long) discussion around clearing learned values / battery disconnects, I was really curious how accurate the service manual was. It is accurate, based on my testing. I disconnected my negative battery terminal for about 30 minutes, then before starting up the truck, I connected OBD fusion and checked the learned values for thinks like Knock Correction Learn Value and the multiple A/F / idle learned values. The later should reset to 0 after a true ECU reset, whereas the Knock Correction Learn Value should reset to 14deg after resetting the ECU. What I found was that, somewhat randomly the best I could tell, some but not all of those learned values truly reset. So this morning I hooked up TechStream and accessed the Engine > Utility and cleared learned values then took another look at the stored learned values. The indeed were all reset to zero with the knock correction learn set back to 14 (I can tell this b/c with 93 in the tank, it generally stays in the high 20s vs. 14 which would be the baseline for 87 octane).

I'm back on the TSB for now awaiting the next 1.05 batch of updates / flash manager, but I was struggling b/c my truck just hadn't been running quite "right" but I couldn't put my finger on it. Seems that even with a battery disconnect there were some ECU learned values that could have been causing some "confusion" perhaps. The vibes that had all but gone away quieted back down after this so that's worth the time to me!

I know one thing, for future flashes I'll make sure to manually clear all learning in TechStream and follow the idle learn procedure (start truck, after it is WARM let idle for 5 minutes, then drive slowly - but >6 mph, stop and idle for 20 seconds, drive slowly for a short distance, stop and idle in D for 20 seconds, then take it really easy for a few minutes to let ignition stuff settle in.
Click to expand...

Not trying to be a dick, but the drive cycle you describe is the last part of the learning procedure that you would use ***IF*** the learning value reset followed by warm 5 minute idle did not result in specified idle speed.
You just know this will get out of hand because people will not actually read that SM procedure and do this stuff for no reason.

bshammer0 · Feb 8, 2019

MOC221_ said: ↑

Not trying to be a dick, but the drive cycle you describe is the last part of the learning procedure that you would use ***IF*** the learning value reset followed by warm 5 minute idle did not result in specified idle speed.
You just know this will get out of hand because people will not actually read that SM procedure and do this stuff for no reason.
Click to expand...

You are correct - that is how it is specified in the service manual. NOTE: No one has indicated performing this idle learn procedure is required at any time and certainly not OVTune. My logic, however, says that since Mat often notes that after a new flash the truck needs to "relearn idle" that performing the procedure called out in the manual would be the ideal way to efficiently complete that cycle before getting on the highway or anything....

MOC221_ · Feb 8, 2019

bshammer0 said: ↑

You are correct - that is how it is specified in the service manual. NOTE: No one has indicated performing this idle learn procedure is required at any time and certainly not OVTune. My logic, however, says that since Mat often notes that after a new flash the truck needs to "relearn idle" that performing the procedure called out in the manual would be the ideal way to efficiently complete that cycle before getting on the highway or anything....
Click to expand...

There is one very important fact in that procedure, and it's been the subject of debate/argument in the thread for some time. Now we know the truth - Idle learning needs a warm engine. It DOES matter. Read it people.
Also, if someone decides to go ahead and do the third part of the procedure (drive cycle), that's their business. It shouldn't be thought of as necessary though, unless the conditions are not met in the first two steps.

SpeySquatch · Feb 8, 2019

bshammer0 said: ↑

After the long (too long) discussion around clearing learned values / battery disconnects, I was really curious how accurate the service manual was. It is accurate, based on my testing. I disconnected my negative battery terminal for about 30 minutes, then before starting up the truck, I connected OBD fusion and checked the learned values for things like Knock Correction Learn Value and the multiple A/F / idle learned values. The later should reset to 0 after a true ECU reset, whereas the Knock Correction Learn Value should reset to 14deg after resetting the ECU. What I found was that, somewhat randomly the best I could tell, some but not all of those learned values truly reset. So this morning I hooked up TechStream and accessed the Engine > Utility and cleared learned values then took another look at the stored learned values. The indeed were all reset to zero with the knock correction learn set back to 14 (I can tell this b/c with 93 in the tank, it generally stays in the high 20s vs. 14 which would be the baseline for 87 octane).

I'm back on the TSB for now awaiting the next 1.05 batch of updates / flash manager, but I was struggling b/c my truck just hadn't been running quite "right" but I couldn't put my finger on it. Seems that even with a battery disconnect there were some ECU learned values that could have been causing some "confusion" perhaps. The vibes that had all but gone away quieted back down after this so that's worth the time to me!

I know one thing, for future flashes I'll make sure to manually clear all learning in TechStream and follow the idle learn procedure (start truck, after it is WARM let idle for 5 minutes, then drive slowly - but >6 mph, stop and idle for 20 seconds, drive slowly for a short distance, stop and idle in D for 20 seconds, then take it really easy for a few minutes to let ignition stuff settle in.
Click to expand...

You can definitely tell when it doesn’t drive “right”. Doing the correct process yielded night and day difference with the throttle response for me. It’s not BS

Double Phister · Feb 8, 2019

If some sort of parameter clearing is suggested after a flash can the new flash manager handle that step?

Deucer01 · Feb 8, 2019

bshammer0 said: ↑

After the long (too long) discussion around clearing learned values / battery disconnects, I was really curious how accurate the service manual was. It is accurate, based on my testing. I disconnected my negative battery terminal for about 30 minutes, then before starting up the truck, I connected OBD fusion and checked the learned values for things like Knock Correction Learn Value and the multiple A/F / idle learned values. The later should reset to 0 after a true ECU reset, whereas the Knock Correction Learn Value should reset to 14deg after resetting the ECU. What I found was that, somewhat randomly the best I could tell, some but not all of those learned values truly reset. So this morning I hooked up TechStream and accessed the Engine > Utility and cleared learned values then took another look at the stored learned values. The indeed were all reset to zero with the knock correction learn set back to 14 (I can tell this b/c with 93 in the tank, it generally stays in the high 20s vs. 14 which would be the baseline for 87 octane).

I'm back on the TSB for now awaiting the next 1.05 batch of updates / flash manager, but I was struggling b/c my truck just hadn't been running quite "right" but I couldn't put my finger on it. Seems that even with a battery disconnect there were some ECU learned values that could have been causing some "confusion" perhaps. The vibes that had all but gone away quieted back down after this so that's worth the time to me!

I know one thing, for future flashes I'll make sure to manually clear all learning in TechStream and follow the idle learn procedure (start truck, after it is WARM let idle for 5 minutes, then drive slowly - but >6 mph, stop and idle for 20 seconds, drive slowly for a short distance, stop and idle in D for 20 seconds, then take it really easy for a few minutes to let ignition stuff settle in.
Click to expand...

Thanks for sharing this. Just to be clear, we should reset learned values after a new flash correct?

Deucer01 · Feb 8, 2019

MOC221_ said: ↑

Not trying to be a dick, but the drive cycle you describe is the last part of the learning procedure that you would use ***IF*** the learning value reset followed by warm 5 minute idle did not result in specified idle speed.
You just know this will get out of hand because people will not actually read that SM procedure and do this stuff for no reason.
Click to expand...

Good point, not everyone will have to do it. Right now my idle is smooth but just above 500 so I think I'll need to do it.

Oscar I · Feb 8, 2019

bshammer0 said: ↑

After the long (too long) discussion around clearing learned values / battery disconnects, I was really curious how accurate the service manual was. It is accurate, based on my testing. I disconnected my negative battery terminal for about 30 minutes, then before starting up the truck, I connected OBD fusion and checked the learned values for things like Knock Correction Learn Value and the multiple A/F / idle learned values. The later should reset to 0 after a true ECU reset, whereas the Knock Correction Learn Value should reset to 14deg after resetting the ECU. What I found was that, somewhat randomly the best I could tell, some but not all of those learned values truly reset. So this morning I hooked up TechStream and accessed the Engine > Utility and cleared learned values then took another look at the stored learned values. The indeed were all reset to zero with the knock correction learn set back to 14 (I can tell this b/c with 93 in the tank, it generally stays in the high 20s vs. 14 which would be the baseline for 87 octane).

I'm back on the TSB for now awaiting the next 1.05 batch of updates / flash manager, but I was struggling b/c my truck just hadn't been running quite "right" but I couldn't put my finger on it. Seems that even with a battery disconnect there were some ECU learned values that could have been causing some "confusion" perhaps. The vibes that had all but gone away quieted back down after this so that's worth the time to me!

I know one thing, for future flashes I'll make sure to manually clear all learning in TechStream and follow the idle learn procedure (start truck, after it is WARM let idle for 5 minutes, then drive slowly - but >6 mph, stop and idle for 20 seconds, drive slowly for a short distance, stop and idle in D for 20 seconds, then take it really easy for a few minutes to let ignition stuff settle in.
Click to expand...

Will the textronic cable work with tech stream? If so does anyone have a suggestion on where to get the techstream software?

treimche · Feb 8, 2019

How is there so much banter over disconnecting a battery? This thread is just amazing

Professional Asian · Feb 8, 2019

treimche said: ↑

How is there so much banter over disconnecting a battery? This thread is just amazing
Click to expand...

Hello, and welcome to TW!

M1Awolf · Feb 8, 2019

Oscar I said: ↑

Will the textronic cable work with tech stream? If so does anyone have a suggestion on where to get the techstream software?
Click to expand...

@Oscar I Yes,the cable and the OBDII adapter/plug from the tune kit will work with Techstream. If you do a search here you should be able to find a link to a free downloadable version.

lapoltba · Feb 8, 2019

M1Awolf said: ↑

@Oscar I Yes,the cable and the OBDII adapter/plug from the tune kit will work with Techstream. If you do a search here you should be able to find a link to a free downloadable version.
Click to expand...

I hooked him up...

M1Awolf · Feb 8, 2019

lapoltba said: ↑

I hooked him up...
Click to expand...

Thanks,I just found the link to the free Techstream in the first post of this thread.

https://www.tacomaworld.com/threads/software-update-for-the-manual.562550/

and to save a click for anyone that is interested in the free version of Techstream.

http://blog.obdii365.com/2017/05/09/toyota-techstreamv12-10-019-free-download/

Oscar I · Feb 8, 2019

lapoltba said: ↑

I hooked him up...
Click to expand...

Yes he did

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TEXAS BS Formerly known as MMXVII

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