2016 OVTune Tacoma 3.5L Manual Transmission / Engine ECU Reflash

Hey @OVTune , how long do you think it'll take to get that ECU?

 

I have seen this chart. It was promising. The MT chart though is not. It may get better.

 

Well I guess you just gotta wait lol. Meantime, I'm gonna enjoy the improved driveability and fat torque bump (I currently run 1.01b).

 

Also the difference in Dyno conditions. the M/T one was done on a HOT day so the air was a concern + it was a brand new truck that hadn't yet been properly broken in. I'd be willing to bet the M/T gains would have been closer if the Dyno room had been in the 60s-70s on a truck w/ 10k miles on it.

 

And IIRC, dyno mule had oversize wheel/tire setup too.

 

Cool, thanks.for the observations. FWIW I don't believe any of the tps sensor readings represent absolute throttle angles. VVTI is separate. I can see Atkinson style Intake VVTI activity on the Intake VVTI Target Angle PID. At low rpm and low to medium load, there is very little advance. Once you get to make load, the Intake target angle pegs to 75degrees which I assume translates to full power Otto mode.

There is another interesting PID. Injection Mode. On our fusion. 0 is port 1 is direct and 2 is both from what I can decipher.

The OBD fusion developer got back to me this AM and suggested rescanning for PIDs. After doing so, things looked screwy (I showed a Boost PID reading 2000psi!). Then I deleted my vehicle and re-entered the parameters. After scanning for PID....I saw Injection Volume! So anyway, it seems the scanning of PIDs at set up is just a bit buggy.

 

It does beg the question why anyone would bother paying for dyno time on an invalid test subject on an unreasonably hot day to work on product development. But, OTOH knowing it wasn't an impressive result and releasing it anyway is at-least a refreshingly honest thing to do. It makes me feel like if he does get a broken in truck with OE size tires on an average day that I could trust the results weren't fudged. I like that. But I'm still going to wait for better results because $800 is $800.

 

No problem!

My ears agree with that. When I get the engine under certain loads, I can hear a different, more throaty exhaust note. I was thinking that it was the DI and VVTi taking over.

That Inject PID would be coal to see. Can you post the PID code for that one? I believe that we can manually enter PIDs in to Torque.

 

I think one of his points is that it still has YET to be proven for the M/T. My thoughts are the same as well. As of right now there is not enough concrete information to justify, at least for me regarding the M/T. The dyno results were far less than intriguing. Do I anticipate getting this eventually? Yes once it is proven and the kinks are worked out.

My complaint with the truck is that it struggles with hills upstate and to be able to really pull its weight at times. Also for me, there definitely needs to be an improvement in the rev hang, I can't stand it!

OV Tune I will say, you have some serious patience with this crowd on Tacoma World kudos to you for that.

 

Unfortunately the Injection Mode PID is not a standard SAE PID. It is part of the extended package you can purchase from OBD Fusion. I don't believe there is a way to see the PID code, and that makes sense. OBD Fusion had to scan and decipher the CAN to find these codes, so its essentially protecting thier work.

 

That's cool and makes complete sense. No worries. Fuzion is on Google Play, so I tossed it into my wishlist for now.

The fuel burn rate and AFR is giving me the info that I need for now. If this were a turbo motor, duty cycle would be great if looking at turning up the boost.

 

Now that I am back in the english speaking world, has anyone wity 04B11 or 04B12 received files? I've been out of touch.

 

test car used did not pay anything.
Testing conditions were not ideal, but a majority of things improved are not what you see on the graph, so the conditions of the room, or the tires, etc aren't really used in determining things to change (like throttle response, target torque maps, etc). Also dialing in valve timing is better when done when it's hot, that way we know under stressful conditions it is safe.

 

Posts 402-404,, latest from ovtune,,

 

Thanks, I must have missed those in my catching up.

 

Lol ya man ,, easy to do

 

Gawd, these throttle gauges are just weird.





The first one was coasting at a lower gear / higher RPM.

The second was coasting in 6th gear.

Both on the highway.

I can't really decipher these. Other than Throttle matches up with what I saw on another page.

The readings all swing at different rates to different percentages while on the throttle.

BTW, the Speed Diff compares ECU speed to the phone GPS.

 

I believe the pedal and tps all have redundant sensors for safety. I'd guess that is why there are so many different PIDs.

I'm gonna refrain from any more OBD discussion on this thread so no one gets pissed. Maybe one of us can start a new thread.

 

I see... Very interesting read.

I could follow along for the most part, but this way outside my knowledge base. Are there other people the perform these analyses?

I am sure OVtune knows what he (or they) are doing, but it would be a lot better if a secondary source could verify this.

The Tacoma isn't some throw-away truck. It's one of their top selling vehicles. Why would they make all these weird decisions?

This is, I believe, the first Tacoma to be mostly designed by Americans. I hope that's not the reason why.

I bet a ban that the next Tacoma will share a global Platform with the Hilux and it will again be mostly Japanese designed.

 

I am not concerned with different dyno days, different trucks, and different temps. The proper comparison is a before run, tune, then run again. Same day, same dyno.