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*Title should read UZS157 Hi all, I got my hands on a Crown Majesta non-immobilized ECU. Luckily, it had the three rightmost plugs still in it, so I'm able to see which wires were connected from factory as well as the wire colours. Click on the images below for full size...

Hi all - will a non-vvti rear sump from an SC400 fit on a vvti 1UZ from a Celsior? Thanks

Hi all, I've compiled a package of wiring diagrams and diagostic procedures for the 1UZ-FE VVTi (specifically 1998-2000 LS400). The diagrams cover a variety of circuits, including ECU, auto transmission, AC, starting and charging, multiplex, shift lock, radiator fan, and more. Also included...

Hi all, I was wondering what causes the power difference between a Celsior and Crown 1UZ VVTi. From my understanding, the Crown outputs 276 bhp while the Celsior outputs 290. I've read that the earlier Crown motors had restrictive exhaust manifolds, but apparently that wasn't the case for...

I'm looking at a '95 LS400 as a parts car, which is OBDII. I'm planning on running a manual transmission. I'm wondering if this engine combo is more trouble than it's worth. I'm okay with a bit more wiring, but is it possible to get rid of all the 'check engine light' codes that are bound...

Hi all, I'm currently gathering parts for my swap, and had a question. I've been researching 1UZ swaps for that last couple of weeks, specifically e30 swaps. Most everyone has used a standalone engine management system. Why is that? I'm planning on using the original 1UZ ECU (non-vvti)...

Hi all, I will be taking a look at a few LS400 higher mileage donor cars this weekend. Since I don't care much about the rest of the car, I was wondering if there what to look for in terms of engine condition. I want to make sure I pick a solid base. In short, are there any steps to...

Hi all, I'm new to Lextreme, but not the Lexus scene. I'm on my third LS400, a 1998, and I absolutely love the car. Up to this point, I think we've had six in the family. The 1UZ is a tank and never presented any real issues. My current car is a baby with about 140k on the clock. I am...