Has anyone else battled with the hot start issue after the 3rz swap?   Mine does fine except it own't start (cranks fine) if I drive it for a while on a warm/hot day, cut it off, and come back to it 10-15 mins later.  Once it cools down, everything is fine.   No other odd behavior besides that.

1999/2000 3rz with dual coil.

Some say its the coolant temp sensor at the back of the motor.  Some say that its the intake air temp sensor, but that appears to only be a thing on 3rz with distributors.  Either way, something is heat soaking and going haywire.  Appears to be a problem on vehicles equipped with the 3rz stock as well.