Brother messed with TPS/throttle stop/dash pot set screws trying to "adjust idle" instead of turning the idle bypass screw. I have noticed there is no method for re-setting the correct throttle plate opening at idle in the factory repair manual, but that in the MFI System--Service Specifications section there is a spec that says, Throttle Body, Throttle valve fully closed angle, 6 degrees.

Can anyone verify if this means: Back off the throttle stop screw till throttle valve bottoms-out, mark the angle as zero degrees, and then set the stop screw when the angle reaches 6 degrees?

 

Back the stop out until the valve is fully closed, then slowly turn the stop back in until it is about to start opening the valve. At that point, give it another 1/4 turn and lock it down.

 

What does the 6 degrees refer to?

 

It should have a paint mark were it was marked when set at the factory. Get that back to where it was. And it should be really really close to perfect.

 

I thought I could but there is no paint on the screw or nut anymore.

 

It's a pretty easy adjustment...I actually had to do this recently. Follow my instructions above or 4crawler's: