Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

Yes, but not settling is very different than actually experiencing "odd and bad driving behavior" as a direct result of clearing and flashing "too often."

I would expect to experience/undergo the completely normal re-learning process each time, but not as a consequence of flash frequency.

Make sense?

 

values are reset as part of flashing, it has to relearn those values. that gives you odd behavior. each time you flash, it's like starting over.

 

Yes, I completely understand that. My point is that, in his last post, Mat's stated that the behavior would be worse as a direct consequence of clearing and flashing "too often."

Do you understand the distinction I'm trying to point out?

 

What I mean is that if you are continually flashing and clearing and never give the tune a chance to settle, like not even enough time for fuel trims to set, the truck will drive like crap, you think there is an issue, you flash and reset again, starting it over.
We recommended clearing learn data only if you have a problem AFTER the initial trim set time.

 

No, that does not make sense. If values are not set, you are going to experience odd/bad driving behavior.

 

Thank you for the clarification! It's great that the frequency of clearing/flashing is not actually a factor, in terms of the subsequent expected behavior during the re-learning process.

Mat has since provided clarity on his previous implication. As I hoped, the frequency of clearing and flashing does not make each fresh re-learning cycle worse than the last. In other words, the vehicle re-learning behavior after the hundredth time you clear and flash the TCU/ECU is no different than the second or third time you did so.

Which is actually a very important point of clarification...

 

I’m putting myself out there by saying this:

Flashing/Clearing frequently does not make things worse. It just introduces an additional variable that is difficult to verify because people’s accounting of events may not be accurate.

Just as a reminder: clearing the learned values became a thing when some trucks had idle issues... or any issues for that matter. For example, my truck had high misfire count. I replaced the CKP and cleared learned values because the old CKP could have “taught” my truck some bad habits.

What’s difficult to identify is a true problem vs. trims needing to settle in.

I had delayed shifting after clearing learned values. I knew it wasn’t a true problem because the truck didn’t do that prior to clearing the learned values. So, after clocking more miles, I re-evaluated the trucks behavior and recognized that it was back to normal.

I (not necessarily Mat) would also suggest clearing learned values when going from a higher octane tune to a lower one. This is only precautionary because the level of clearing that occur during the flashing process brings your truck to a safe range.

I see now that Mat stepped in and provided the clarity you were seeking.

 

Ya, I'm not clearing anything anymore lol

 

\Looks like it'll be another day... can't get a tune to load now, first time ever and
I've been on every one.

 

How do your misfire counts look now that you replaced your CPS?

 

try the P5-CAN-bus

 

Tried both several times, no go.

 

I was on 04b03, too, running 87 base. I was curious to try the performance version and figured I should be on the same ECU version as Mat's test truck, after seeing his dyno article. So I installed the TSB, verified it worked, then flashed 87 performance. Drove it that way for a couple of days. First few drives actually were great, other than the twitchy throttle. Ended up not liking that twitchiness and also was getting some pretty ugly shuddering at highway speeds/low rpm, so I went back to 87 base. I did not clear any values at any point. The truck still gets the shakes in high gears/low rpms sometimes. On 04b03, all of the various 87 tunes have always had a bit of 'rough road' feeling at certain highway RPMs (I've been using OVTune since 1.03), but it was always subtle enough that I thought it might just be a suspension shudder. The shakes it gets post-TSB are very noticeable - like vibrating steering wheel noticeable. The only time I didn't have any sort of shudder was when I was running the original 1.05 93 octane base tune on 04b03.

Anyway, at the moment I regret upgrading to 04b04, too, but I also realize that I've changed too many variables all at once to be certain what, if anything is wrong. I'm hoping the ugly shuddering will go away as the truck finishes its post-TSB learning. If not, I guess I'll be forced to pay premium gas prices, because I can't imagine whatever is causing that shudder is good for the vehicle's long term durability, and so far the only variation (tune or stock) where the truck is truly smooth is with high octane.

 

So I’ve been on 1.05 87 performance for a while now. Love 90% of it. My only issue is I still have a dead pedal feel when trying accelerate going around 60-70 with 33s. I know I know push on the gas farther but it just feels weird, just not enough power there I guess. Any of these new developments on these dyno days to help this?

I guess I’m still thinking about doing gears if that will keep me closer to the power band. I just don’t want the shift schedule to be all jacked up.

Hmmm what to do? Keep hoping tune updates help this? Wait for turbo/sc kit? Or do gears?

Anybody got advice?

 

The only variable this time is a new laptop but all drivers//apps
installed with no issue, no other errors except the unsuccessful
install of the tune, tried re-writing the 93 perf. that's already on the
truck to see if it was just a wonky download of 87 perf. but ran
into the same issue.

 

I did this, flash the ecu with the engine cold, then after flash turn off the vehicle then turn on the engine and wait until it reach operating temperature, then turn off again, lock it wait like 2 minutes, then unlock it and turn on and drive. My Taco is driving great with better engine response and also better mpg, and of course no more gear hunt. Taco 18 1.05 91

 

I feel ya brother

 

Might be issue with the USB port. Try a different one? If USB 3.0, might need a USB 2.0 hub.

 

I've had that issue in the past tried them all, I have both. Were it
a usb port issue I would have thought I'd have either dongle issues
or cable issue but both were seen fine. Just not sure yet what this
could be.