DIY - 1.8L 1ZZ-FE TB Connector Chip Swap

[MGargano]

Originally Posted by jkuchta

turn the screw clockwise a half turn with the engine off. That should make it better. Also, if a half turn isnt enough, keep turning in half turn increments (with the engine off).

I gave up on the 1ZZ for the 2nd time. No matter how many turns I gave the idle screw, after a while the engine would settle back down to around 500 RPM, shake/shudder, rev up to 1,000 RPM, and then repeat the process until I either started moving or turned the car off in frustration. I hate all the problems I'm having since the performance of the the 1ZZ really is noticeably better than OEM, but I can't take the way it idles. I was also getting the heavy jerking whenever I took my foot off the gas.