Tacoma ECU Tuning for 4.0L

Its extra wear on the tranny doing all that extra shifting not to mention how annoying it can be. TacoMike is correct, the do this on purpose to get a little better mileage, unfortunately it ruins the overall performance of the tranny. Its best to stay in the power band when your accelerating, then let it go into OD when your at speed. The problem is that the cars in front of us never accelerate fast enough or they hesitate so the tranny is always dropping into OD way too early and ends up hunting, I hear the new Tacos are even worse with the double OD.

 

This, I've heard the same, what gives.

 

You guys ask too many questions, scared off the OP.

 

No one called you stupid although you did admit to driving 70 mph in 4th gear. Your first clue should have been the engine revving higher than normal for your road speed. A quick glance at the tach would confirm the problem.

I just answered the question as it was asked. Don't worry though I will refrain from answering your future questions.

 

Probably the ECU is heavily encrypted like most other makes. You'd need to be able to reflash the ECU from an OBD2 port and if you can't do that, only option is a piggyback type thing or a MAP/MAF box.

I'm more involved with other makes but consider the following. BMW 07-12 N54 twin turbo engine is a great motor, ECU was cracked some time ago but it took a long time and they are still finding new things to tweak, file is huge and very complicated. The ZF 6HP21 transmission commonly mated to it has not been cracked until very recently (last 6 months or so) and that was a huge deal, being able to reprogram that for faster/firmer shifts etc. They are still working the bugs out, but that was/is now the weak link putting power down.

Modern tuning resembles cracking NSA-level crypto shit, or at least seems so. The impetus for the BMW is the direct injection twin turbo N54 motor can make almost 1000 HP, over 3 times stock power, on stock internals (say low 800 WHP) without too much effort, so lot of folks wanted to crack the ECU. Mods tend to follow the ECU cracking as piggybacks and so forth are sometimes less than ideal. In the 4.0 Tacoma's case, most people are not interested in pushing double or triple stock HP, and frankly they probably couldn't without super expensive engine & drivetrain work. And cracking an ECU with this level of encryption for 50 HP, forget it.

 

would be cool to see what all could be made as far as gains go, it seems to be well documented the the stock tune is a bit rich since it leaves soot all over everyone's passenger rear mudflap.

 

Interested!

 

2nd group buy for supercharger ..if any are interested.

 

I'll show you guys some of the maps in the stock 4.0L if you're interested.

We can control everything the stock ECU controls. It's just a matter of finding all of those controls. We have most because the general code / data structure is identical to lexus vehicles / other toyotas which we have done a lot for.

The biggest "consequence" of the stock 4.0L tune is the map size / resolution. They are tiny. But there is still plenty of room for improvement.
Our handhelds can flash by OBDII. It would also be the cheapest option other than bench flash. We can offer both.

Lets do this. Everyone that is interested and wants us to develop for their vehicles, could you post an image of your ECU on the board?
that way we can compile a list of ECU versions.

 

where do i find my ECU...

 

Passenger side footwell.

 

Holy shit! If the price is right, I would kill for a tuner for 05-11 and 12-15 1GR! I don't know if you could but if the 2 partial generations run differently, please do 05-11 first. Would love to see tuning capabilities for this vs UCON, $1,600 is a lot to spend for something so miniscule IMO. Love the RC 350 too!

 

can you explain what this is about?

 

MOAR POWA!!!!

 

Hey all, I've been absent from here for over a year or better, however, I'm back. If someone would not mind, could you inform me some on what's going on involving this ECU tune? Yesterday I just bought an 06 Tacoma TRD w/Off-road package and towing package with all that came with them I guess. I don't recall mine doing any kind of weird shifting patterns except on really steep hills, 8% or greater it will downshift into 4th. and then run about a 100ft. and downshift into 3rd. unless I'm on cruise and I'm doing 65-70 mph. I live near Asheville, NC. and we have some major hills. I want to do some upgrades and mods and whatever else will help this thing "Perform." I have not noticed any issues and I don't have to "stomp" on it to get it going. If I get on it just a little bit, this truck just catapults itself like a rocket and digs in! I absolutely love it. I'm very impressed with it and having 147,000 miles on it, really makes me a happy camper. Any, and all input will be greatly appreciated. Thanks !

 

Same here. Wondering if it can eliminate the throttle lag when shifting.

 

Would like to know about this ECU mod, and adding a Supercharger to my 06 4.0L 4x4 TRD Off-road. Price for all ? Thanks all.

 

In addition to shifting into OD too soon, I think the torque converter locks up a little too early as well. Can't really do anything about that though since it's completely controlled by the PCM.

 

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