2016 OVTune Tacoma 3.5L Manual Transmission / Engine ECU Reflash

Still happy with B - 93 - and a PC!!!!

 

No. :-(

 

In my 12 miles of driving here are the things I noticed:
- Slight jerkiness when lifting quickly from cruising at a moderate speed (48mph in 5th gear). This is pretty mild and if I smooth my lift it doesn't happen.
- Surging of engine between 1000-1200 rpm at about 1 or 2Hz that I've never noticed before. This was at a stop light on a slight incline when I was holding the car stationary with the clutch instead of the brake (yeah, I know I'm not supposed to do that). I grabbed my phone to get video but it stopped by the time the camera came up.

Both of these are pretty minor and I only have 12 miles so I know all the learning is not done, so I will wait to see how it changes. Through all the posts of the various issue, the surging is the one that concerned me the most because I literally have 1" of clearance in front and behind my truck in the garage so it takes some feathering of the clutch and gas to not crush anything!

 

Anyone have a 2016 with 0B411 ECU?

 

Taken from the alpha tread:
also some upcoming stuff -
- update on TT kit development
- hard part development


we will be working on a modified version of the tune for people who have gears.

https://www.tacomaworld.com/threads...g-alpha-release.495735/page-702#post-17371360

 

other than me?

 

Do you have the 1.03B tune files?

 

I'll send you them tomorrow

 

Yep, stuttering is my only major complaint with 1.03C. It is worse before the engine is up to operating temp.

04B10 91 file

 

Yes, that slight jerkiness I believe comes from the injector cut off being very abrupt when throttle is let off. I'm betting dollars to donuts the factory tune doesn't have as much of an immediate injector cut off when throttle is lifted. I noticed as well if i really smoothly let off the throttle, it doesn't jerk. I guess it could also be related to throttle mapping as well. I'm sure there's a middle ground here somewhere.

Please be advised i'm still quite enjoying the tune and am really nitpicking issues here. I can definitely learn to live with the touchy throttle tip in. Though i'd prefer it be tamed just a bit. The actual mapping of the throttle feels fine past tip in.

To clarify, the desire here should not be for an overly aggressive throttle, it should be linear. If i give it 5% throttle, I want 5%, 50% throttle should give me 50%, etc. I feel so many of you want 50% throttle at 5% pedal. That's an unpleasant drive albeit possibly a fun one.

I'd prefer if possible, OVTune make the standard tune with a complete linear throttle mapping for all modes in all gears. Consistency of muscle memory is key here. For folks who want that aggressive overkill mapping, offer it as an aggressive tune. Many other tuners do that (mustangs, ecoboost, etc).

Lastly, I'm sure the stuttering thing can be worked out on the dyno. So far I've only felt it once with a cold engine but I'm likely going to run into it daily as I jump on the interstate about 3 minutes after starting the truck every day.

I have no desire to return to stock but also don't want to keep swapping different tune files. ECU learning is key and I want to give it that time. 150 miles so far and really most of the learning should be done around 500 to 1000 miles.

 

Ya, that jerky-ness when the throttle is releases is noticeable. I try and ease out the throttle to avoid that, but overall, liking 1.03c

 

You guys sure that jerkyness on throttle lift isn't the Toyota drivline slop and axle wrap "springing back". BTW, guys on stock tune have been seeing the stutter.

I wouldn't be surprised to see that it is caused by some of these "digital" events Toyota has decided to add to the mix. Intake damper switching; Port/Direct injection. Switching these thing mid power band without some VERY careful ECU code would make them noticeable. Especially if the code is sensitive to physical hardware (sensor, actuator) variation. They added all this stuff, then put their B-team software crew on the job. Recipe for failure.

 

It is not drive train slack. Especially considering it wasn't there pre tune and is there now and easy to duplicate.

I had no stutter stock.

Honestly, I'd prefer a full OTTO (i believe that is the right acronym) mode and just completely disable Atkinson. The slight mileage hit is worth the increase in drive-ability.

 

Hello Guys! First post even though I've read every single thread in both the OVTune auto as well as manual threads since day one. I'm confident that Matt will get our tunes straight for us soon enough!

That said, I have around 1000 miles on 1.03b as well as ~1000 miles on 1.03c. I just recently switched back to 1.03b for what I think is better throttle response down low. I too have experienced the jerkiness/stuttering many of you have mentioned but of course would take either tune over stock any day of the week.

I would totally be on board with an Otto only version as well. As a matter of fact, I think it would be great if Matt released version 1.03d or 1.04a like he normally does, i.e. 87 tune and a 91 tune but with the addition of an Otto only option for each.

Matt, if you read this, are you able to speculate what the HP/Torque curve would look like below 3k in comparison to a non Otto tune curve? Maybe this isn't the best way to quantify an Otto tune relative to a non-Otto tune but you get what I'm saying. People might be more responsive if they knew what they were or were not going to get with an Otto only tune option.

Thanks!

 

Yup, same problem here. It's very bad when cold and gets a little better when the motor warms up. Still annoying tho, this tune needs some fixing.

 

Same problem here. I am going back to stock until this is sorted out. The stuttering, bucking and surging at the 2200-2800 mark cant be good for the motor imo

 

You're not the only one lol

 

if there is anyone who has working techstream for logging, and wants to do a few back and forth logs and updates I can get going on some more MT changes.
the thing is this super low RPM issue I cannot get this type of data on the dyno that I need

 

See, I read stuff like this, and the stuff that @MOC221_ and others have posted, and I experience the strangest sense of confused relief lol because I just don't have it. Sure, maybe I avoid it by staying a bit higher in the rpm band, but I haven't been able to replicate the issues when I purposely try either. I'll go even lower in the rpms than what people report and the only stuttering I can produce is the truck about to die due to no gas and too little rpm lol

I'll no doubt flash whatever updated map that Mat puts out because why not, but I don't envy your guys' struggles