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Soarin
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Location:
Sydney
Registered:
June 2002

Re: Yet more 1UZ ECU questions

Tue, 01 February 2005 02:04

altevan wrote on Mon, 31 January 2005 20:27

Hi all, I'm from the states but I'm down here on these forums to chat with the real experts. I'm planning a 1UZ -> RA21 conversion. Manual trans is strongly preferred. I understand the engine ECU from the crown royal is a favorite since it operates w/o the trans ECU. However, I don't think this car was ever sold in north america. Questions:

* What do these ECUs cost used down there? Are they easy to find?

* When were they made? Are they OBD-I or OBD-II?

* Are they relatively generic, ie, if it's an OBD-I ECU for instance will it work on a north-am market OBD-I 1UZ?

* Are there VVTi versions? A VVTi 1UZ would be very sweet if I could get an stock ECU both to work with a manual trans, and to fake it out with all the other crap it depends on (e.g., ABS, etc). I'm guessing this is out of the question, though.

* What all do I physically need? I'm a newbie to EFI, so... I know I need the box, and all the wires coming out of it, that hopefully connect to sensors, injectors, and ignition on the engine... Pardon my ignorance.

BTW, this is *mild* conversion. I don't have lots of money, time, or expertise. Aftermarket ECU is probably too costly and complex.

thanks all. --eric

I'm don't know much on the 1UZ's, but from what I read on other boards this is the info I could come up with...
* Aftermarket ECU's I'm not sure, but everyone here says that a Microtech would cost around $1100AUD so go by that.
* 1UZFE motors were available from 1989 (in the Toyota Celsior, aka. Lexus LS400 then later in the Toyota Soarer, aka. SC400)
* About the OBD-II issue, I think they turned OBD-II when the Lexus GS400 was introduced in the States, and I'm pretty sure VVT-i came out in the later 1UZ motors.
* If possible, go with a front cut, as then you'll have most of the things you'll need for the conversion (motor, ECU, other electronic control devices used, tranny, front suspension parts) then you'll have to source the parts to make it a manual (I don't think any car that was fitted with a 1UZ ever came with a manual transmission). I've seen W58 gearboxes fitted up to 1UZ's before but that's all.

Hope that helps

Jose

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