Tacoma ECU Tuning for 4.0L

Do a search on (Pig or pig rich) in this thread plenty of examples mostly a function of system going open loop, the positive thing is the OV tune is incrementally making the recovery from open loop a little faster as the version progress. I started with the BullyDog tune that was part of the Magnuson SC group buy, installing that tune into my 2013 4x4 OR ECU was a fatal error for my particular case it ran like crap had knock, crazy shift points just overall awful, and at the time a reflash to the TRD tune was not within easy reach so I eventually found myself with the OV Tune which dramatically made the truck drivable again.

 

@OVTune, can you clarify for me...

I have one of the first 25 or so handhelds for my NA 4.0 running the 91 tune. Is this handheld going to still provide me future tune improvements or do I need to restore the Toyota tune and buy your new software and cable to be able to tune my truck going forward by myself? I only want simple, plug and play solutions.

There’s so much info and back and forth details in this thread now, it’s hard to keep things straight.

Thanks.

 

Updates that we create will be available for both the handheld and the flash software

 

Even in open loop you shouldn't be running anywhere near that rich boosted or otherwise

 

10.5 AFR with boost and a higher amount of advance is just fine.
The leaner you go with boost the more heat and the more ignition you have to pull out.
These engines make power with ignition, you will make more power with more ignition and richer AFR than you will with less ignition and leaner AFR. Considering that with boost you should see be under 12.0 AFR generally.

Lets say you tune it like a traditional low psi supercharger.. AFR *around* 12.0 12.2... well I've tried and the engine knocks a LOT. you have to remove a lot of advance and end up with less power than a TRD tune.

 

I'm just spitballing here but, it may be so rich that with any internal deficiencies of the engine, IE worn rings or shitty injectors the amount of fuel intro

Are you still planning to produce custom tunes tailored to user supplied data logs?

 

So, run it fatter and keep the timing. Shoot for say, 11.5-ish AFR for boosted trucks then? Or richer?

 

Spiking to 8.5 the coming up to 10 is way too rich I don't care what kind of engine or combustion chamber design you have. It should spike to 10.5 then settle at 11

 

The sudden rich spike isn't from tuning it's from how this ECUs fuel control is. There is only so much that can be done, the ECU is not at all setup like a normal forced induction ecu should be. It relies on a pretty on really basic fuel concepts.
When the ECU reaches those switching points it will change to power demand / power equiv ratio and it's unmetered, the ECU does not take any feedback at that point.
Same reason these trucks will be rich when shifting,

 

So, these switching points you mention. Can we play with where these happen ?

I am having an issue where I’m running lean at partial throttle acceleration. Say, 40-60% throttle accelerating in 4th gear. Boost goes to like 4-5 psi. AFR is staying lean in the mid 14’s and I hear knock.
Now, if I really mash on the gas pedal and get it over what I’m assuming you’re referring to as “switching point” it fattens up. But, that’s not really conducive to smooth driving.

 

@OVTune Is it possible to get an aftermarket ecu that can be programmed to overcome these limitations and operate like a normal forced induction ecu. If you can program it or provide a better ecu to work with these trucks there is a lot of us that would be on board.

The capabilities to better adapt to bigger injectors, methanol injection, rev hang, air injection deletion, etc, would be awesome.

 

Everything, the switches and otherwise can be adjusted in the stock ECU. The stock ECU is a better idea for most trucks because it communicates with the entire truck. A standalone is a serious job and not really ideal for a daily vehicle.

Everything can be adjusted. The sucky part is that the ECU is load based but relies almost completely on adjusting by : Accelerator / throttle position / MAF air load / closed or open loop. But it's not impossible to tune perfectly. We really just got to get our own R&D truck to play with all the little settings.

 

Awesome, thanks for the response and can't wait for awesome tunes! My kit should be arriving in the mail tomorrow so I'm very excited to get set up soon.

 

No, FL. I found another shop who had the licensing for my ECU already and was willing to set me up for $400. Appointment is set for next week!

 

How can a full standa

How can a full standalone not be a good option for a street vehicle? Once you're past a certain point the stock ecu is your limiting factor and can be detrimental to your drivetrain if you're not careful. A standalone is fully adjustable usually on the fly so you can make adjustments much easier which makes drivability much improved. Haltech, aem, motec etc all have ecus that would fully integrate to our trucks no problem. Just search Ekanoo racing to see what's possible with a 1gr with a standalone.

 

And with a standalone you can ditch the MAF and switch to a map based tune which is way more boost friendly.

 

Anyhting is possible with a standalone. What I mean is that for a majority of people it's not ideal because unless there is a plug and play standalone you have to wire it in, calibrate sensors, etc and have a full dyno tune. I've tuned many standalones and in my opinion unless there is a plug and play that connects to stock harness ( I have not looked for this truck, there might be) with a starting calibration by the manufacture of the standalone, then rarely is it as good as a stock ECU in terms of overall driving. What I mean is cold start, hot start, cruise, etc etc. All the *little* things the stock ECU is perfectly designed to do.

now if you want to make big power, or easier power yes standalone for sure is the best solution.

 

Most people whom are pushing big ppwer would have no issue spending some more money on a proper fully programmable ecu ro bettee control that power. Yes there are several companies that make patch harnesses for different ecus for our trucks it's just a matter of buying them.

 

Any update on V2 Calibration for 6MTs?

 

Working on it. All these changes for 2019 and holiday orders have us going as quick as we can.

MT V2 will have adjustments to throttle, airflow demand, and a few other tables.

Speaking of that I do have some questions for SC owners for some developments for next year. Once we get our full blog post out for 3rd gens major transmission / tune update out today I'll post about that.