Should contact gadget. He would know. He has a sc kit for the 2tr tacos as well. I think he uses map ecu3 for them so he most likely has the info you need.

whats wrong with alpine developments? first ive ever heard of them

thewarriordinghy said:

whats wrong with alpine developments? first ive ever heard of them

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I believe they are significantly improving nowadays with the leadership of David, but they still have a long way to go. Read this post from Gadget which summarizes their history:

http://www.xr-underground.com/forum/showpost.php?p=962592&postcount=30

iniazy said:

I believe they are significantly improving nowadays with the leadership of David, but they still have a long way to go. Read this post from Gadget which summarizes their history:

http://www.xr-underground.com/forum/showpost.php?p=962592&postcount=30

Click to expand...

sounds pretty sketch to me

I know where to find a dyno of an N/A 2TR for rough comparison. Curious to see how this performs after the mod.

I am also curious if there is a file for the UCON that makes it work for the 2TR? Since you have one, you could test it on the Prado.

Torspd said:

I know where to find a dyno of an N/A 2TR for rough comparison. Curious to see how this performs after the mod.

I am also curious if there is a file for the UCON that makes it work for the 2TR? Since you have one, you could test it on the Prado.

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No way. The UCON is specifically designed for the 1GR ECU, and the plugs will not go into the 2TR ECU.

That's why Gadget uses the MAP-ECU3 for the 2TR Tacoma.

I don't have the UCON anymore, it's been sent back to Gadget to be replaced with a universal MAP-ECU3, still waiting for it to get to him.

The HiLux 2TR makes 118 HP on the wheels. With the supercharger it should make around 200 to 215 WHP.

thewarriordinghy said:

sounds pretty sketch to me

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Yeah, but the guy had to choose between buying a new URD unit for $4000+ not including shipping and customs charges all the way to Saudi Arabia, and between getting one for $1500, no shipping charges.

I told him the problems faced previously and we agreed that he will not pay anything until he tests the car after installation and is satisfied with it.

Ok. I understand now.

Sounds like a good practice to me. :top:

Anyone can tell me if the Tacoma 2TR uses a Toyota AFR sensor or a conventional narrowband O2 sensor?

The 2TR HiLux uses a single 1-volt narrowband O2 sensor, my assumption is they will be the same, but I've just seen a diagram somewhere that cast some doubt upon me.

I cannot help technically, but I can offer this. Compare the 2TR's pre-cat sensor to your vehicle's pre-cat sensors. If the harness plugs are the same, swap them and make sure that you get no check engine lights. If you have a Scangauge to see if the swapped sensors are reading properly then there you have it.

Otherwise, compare part numbers and see if they are the same.

Torspd said:

I cannot help technically, but I can offer this. Compare the 2TR's pre-cat sensor to your vehicle's pre-cat sensors. If the harness plugs are the same, swap them and make sure that you get no check engine lights. If you have a Scangauge to see if the swapped sensors are reading properly then there you have it.

Otherwise, compare part numbers and see if they are the same.

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Yeah, part numbers is much easier Thanks.

It looks like it's a AFR. (edit: I was wrong. HiLux uses single O2 and Prado/Tacoma uses AFR upstream and O2 downstream).

There's a guy in the UAE who has bought URD's 2TR kit for a HiLux and used the AFR calibrator, and looks like it's working fine with him.

That explains why I've always had trouble tuning the HiLux in the past; I used to intercept the O2 sensor and modify its voltage. Yet another BIG failure in the Alpine Developments installation instructions. MAN! That caused me so much trouble in the past.

Well you've got figured out now. What a hassle.

Perfect Power wired to the harness extension:


I know it can't tune based on MAP, but I'm hoping it will do with stock injectors. The SMT8 V4 has \built-in dual channel AFR adjusters, but I've never tried it properly before. So I'll try it here and see if they work. If not, then a MAP-ECU will be in the works.

Now just waiting for the guy to bring his Prado in.

Well you already have the extension harness. If it does come to be that you switch to the Map-ECU, then wiring wise, you already have one piece of that puzzle.

That is a tuning device which is not common State side. Never have seen it before. Does it only adjust the AFR, with no MAF intercept?

Torspd said:

Well you already have the extension harness. If it does come to be that you switch to the Map-ECU, then wiring wise, you already have one piece of that puzzle.

That is a tuning device which is not common State side. Never have seen it before. Does it only adjust the AFR, with no MAF intercept?

Click to expand...

It does MAF intercept and AFR adjust, and advance and retard timing. But the biggest drawback is that it uses TPS for engine load, which is not a very good idea with FI. It may work for N/A. I'm hoping it would work here since I'm not changing the injectors. It does have a 1D MAP table, more like a compensation table actually, and requires an external MAP sensor.

This is the one I had in my Fortuner V6 before I removed it and installed the MAP-ECU, because it wasn't capable of handling the larger injectors.

It all makes sense now.

Prado is in my driveway, getting ready to go under the knife.

I welded a widebad sensor bung in the exhaust pipe yesterday upstream of the first Cat, and plugged it with a screw, in preparation for plugging in the AFR gauge. The guys at the exhaust shop were kind enough to do it for me for free, long time customer.

Now I need to find a MAF housing. The MAF sensor in this Prado is quite different than the HiLux, the latter uses the same Denso sensor that is in the 1GR engine, but this one is quite different, looks just like the tacoma's.

Also, another difference is the Prado has a rear O2 sensor, while in the HiLux there was only one AFR sensor, no O2 sensors.

I took the car for a spin, and I have to say what was Toyota thinking, fitting this engine in this car. It is immensely underpowered, really sluggish. Much more so than the HiLux, I think the Prado is considerably heavier. Especially with this four speed auto. I understand now why the owner wants so desperately up the power.

Here's a picture of the Prado in my driveway:


A picture of the engine bay:


I'll be out this evening looking for a MAF housing for this MAF sensor. I wonder if there's an adapter to plug in the 1GR-style MAF sensor to this harness.

I would be grateful if someone can share the wiring diagram of the 2TR engine to the MAP-ECU3.

I just discovered a revelation! The HiLux actually does use a single narrow-band sensor. I just found an old defective O2 sensor that I pulled from a HiLux several years ago, and checked the part number and plug shape, and cross-checking it with RockAuto parts, it turns out to be a heated O2 sensor, not an AFR sensor.

While in the Prado (and I'm guessing the Tacoma 2TR as well) it has a front AFR and rear O2.

Which year model Hilux?

I would imagine to keep costs down, that Hilux's using the 1GR would have AFR sensors pre cat, and O2 post cat, just like here in the States. I could be wrong though.

Also, if you can take a close up of the MAF sensor, from the part which meters the air, as well as its flange, that we could find something online.