PlayDate
Well-Known Member
In this order -
Adjust the TPS with the primary butterfly stop screw - engine does not have to be running to do this.
Adjust the IAC with the secondary butterfly stop screw - engine does have to be running and at operating temperature to do this. I'd set the IAC as low in the duty cycle as possible.
Again, adjusting the secondary butterfly should not change the TPS zero.
I agree with you but on several occasions now he has specifically said adjusting the secondary opens the primary. I don't remember this being the case but if his throttle body behaves this way it makes the adjustment problematic with the TPS.
I will also add why would they have two adjustment screws .....one for each throttle blade .....if you could not adjust them separately?