Oh, while we're here - does anyone know what part of this controls the high idle at start up ? Truck just started NOT high idling at start. Is that also a main function of the TPS sensor, or would there have been another vacuum / intake hose fracture air-leak ?

 

Is it cold

 

Yes there are too many hoses on 22RE but I'm not going to second guess Toyotas engineers.
Its safe to assume the coolant passage through throttle body is metal. On 1998 GM 3.8 its plastic and prone to failure and when it fails cylinders fill with coolant and ultimately destroy engine,,,

 

Well, I found my PROBLEM! After I reassemble entire throttle body that was detail cleaned and re-calibrated and replacing every air hose and sealing every leak - problem still exist. I look in air-box to find the actual FLAP is SEIZED! Argh. I haven't dismantled this yet to see what failed yet. Can't find a replace at any LOCAL auto salvage yard YET. Real drag, now I guess I have to study the manual again - sanitize the whole thing and re-calibrate THIS too.


Filthy seized air flow sensor

 

I read recently those are not serviceable but your research may prove me wrong. Keep us posted. Good Luck

 

I can fix this sensor with time consuming precise sanitizing. This is possible for me to re-create the circuitry from a potentiometer. It would be nice to have one sitting here to compare readings to. I think I can get what I need from the FSM.

The under-side of this has about 20 screws, with what looks like epoxy seal around it. I fear I will have to deal with ANOTHER broken bolt if I attempt to dismantle the housing. The shaft is SIZED in there somehow, something must have got jammed in it. I can't see or tell the condition of the bearing or whatever else is there.