VVTi Managment Greddy

[drifto]

Originally Posted by johnphive

With the Yaris and many new cars the ECU re-learns the adjustments. One way to stop the ECU from changing the tune is to un-hook the first O2 senor on the exhaust. This works on most vehicles including the Yaris. The only bad thing about this is that it creates a check engine light but the ECU will keep the tune. I had to do this on my buddies 04' civic and my old Mazda 3 Turbo. Works with the E-manage and the Apexi's.

this is why i miss my 86 corolla. everything was so much easier to work on then
damn you emissions laws!!!