Installed the 1zz throttle body -

[tk-421]

I just finished my own TB swap install. I made the chip swap from the start, took the epoxy off the idle screw, and bypassed the TB coolant lines, just as other members have done.

I was unable to find a silicone coupler quickly enough, so I just used a dremel with a filing bit on the inside of the hose until it fit perfectly.

I just took it back from a test drive, and have a BIG smile on my face. No CELs, no weird idle fluctuations, nothing. The only small detail was that it idled at 3K for the first minute or so. After that it steadily went down until it got to 0.5 K.

So now I guess that I shouldn't even need to adjust the idle screw at all. I'll try it out for a couple of days. If nothing happens, I'll just seal the screw again and be done with it.

The difference can be felt right away. And not only did I not notice a power loss at lower revs, but actually a gain! The car pulls a lot better now, even from a complete stop. And the sound is amazing too.

Many thanks to Yaris T-Sport for his excellent idea to swap the chips, and jkuchta for his writeup!

Now on to the 4-2-1 header...