TLaVac said: first off you never adjust the throttlebody screw for idle problems,the tps has screws on slots to adjust the voltage,not the throttle plate.by doing this you will not have full throttle when you floor the acelerator,also this can cause a stumble.mid america sells a cable to just that for $14.99 with instructions on how to adjust the tps,all you need is a digatal meter.the part# 601-092.you now will have to put the throttle plate back to where it was make further adjustments.tlavac
I was having the stumbling, and I knew that I didn't have full throttle options before as the screw was pushing the throttle plate more open. I've since backed out the throttle plate completely and noticed the idle is where it is supposed to be, and I'm not having a stumble from a stop. So I didn't adjust the throttle screw for my idle issue as I know that the ECM controls that, but having the plates partially open caused me to have a higher idle. Definitely frustrating trying to figure out what previous owners have done or tried to do incorrectly.
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