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I’ll throw in a little update after some highway driving yesterday: I seem to be lighter on the throttle to maintain the same cruising speed. I’ll have to do a long-term MPG test.

So my ACIS solenoid died, and the intake manifold had to come off... So I figured, why not buy the plastic 2UZ intake from badblackgs and see what happens when I install it? From his experiments with it, he noticed a decent increase in torque. Plus the plastic keeps the air temperature down and...

Way to channel the old Rod Millen IS430 spirit! Killer job.

So today I discovered that our 1999 2UZ sort of does this too. In first gear, under maybe 30-40% throttle, I can feel a sudden power jump right at 3000rpm. Most noticeable in first gear. Not as significant as my 1UZ, but noticeable. Since this engine has no VVTi or ACIS, what might be the...

So while I’m acquiring all the parts to install the Tundra intake, I used wire to tie the ACIS into the closed position. The difference in torque is noticeable. Much more eager to move. HOWEVER, I still get the power surge right at 3700rpm! I’m not sure what to look at now. Is this an indication...

Update: Getting the intake to bolt on requires just removing a small amount of plastic around the bolt hole closest to the driver. Then, you use the 1UZ fuel rail with injectors from a 98-02 2UZ and they’ll plug right in. Then you have to flip the throttle cable bracket upside down and bolt it...

Like the title says, I have the black plastic intake manifold for all 2005 and up 2UZ engines. It will also bolt right on to the 3UZ, and I have injectors that are plug and play with the 2000-2002 3UZ harness. To make it work on a 3UZ the holes on the throttle body just have to be filed out a...

If I remember right, the reservoir doesn't actually fit under the Tundra intake manifold, and I've got a free bolt hole where my intake tube resonator used to be. So it's easy and if there's some kind of problem after installing I don't have to rip the manifold off again.

My Tundra intake arrived today, and I’ve decided to relocate the VSV and vacuum reservoir during the swap to make it easier to change that little part. @gloverman do you know of an aftermarket equivalent for that VSV or is the OEM part he only option?

Huh. Well I know what I’m doing if the ol’ 1UZ craps the bed.

@gloverman how hard was that to set up? If I remember right, all of the sensors like cam and crank and knock will swap across if the plugs are different, so I assume you just had to use a 1UZ throttle body?

Dammit, forgot to attach the pic. ACIS solenoid unplugged I think.

Okay @George_R I’d forgotten about this thread, but I got some time to tinker with Techstream and such today. I don’t think the ACIS is working. The actuator stays in the same position whether the engine is on or off. And, if I unplug what I believe is the ACIS control solenoid (pic attached)...

There’s a guy who modified a 2UZ VVTi intake to fit his 3UZ, and he’s selling it to me soon. It should bolt to the VVTi 1UZ without issue. I’ll inspect it and make note of what mods were required to make it work. I know one of them was using injectors from a 2002 Sequoia. If I get it working...

I cut up a dish soap bottle and zip tied it in place. I think I was too late though, my voltages are starting to act up.

I don’t get much time to read books anymore so this thread is filling my requirement for a good mystery story. Carry on.

How does one pull live data from a 93 ECU?

See if another ECU does anything. In the meantime, somebody with more experience ought to chime in. I can't think of anything but maybe the knock sensors, but I think those signals are processed regardless of operating temperature.

I wonder if your ECU has bad capacitors. I remember reading something about early 1UZ ECUs having trouble. The reason I suspect this is you're not having trouble until it switches to closed loop mode and it's making calculations based on sensor input data. But usually if there's a sensor sending...

I found one post on ClubLexus about fitting a 2005+ 2UZ manifold on a 3UZ, which means it'll fit a 1998+ 1UZ. There are other posts that say this topic has been covered here, but I can't get search to work. Has anyone done it? How bad is the job? The CL member said he definitely felt some...