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TPS caused my Throttle Body to get stuck in the closed position. #1077540 04/01/15 05:35 PM
Joined: Jul 2002
Posts: 1,758
Jay Ayala Offline OP
Body Damage is Cool
Whoa that was weird. On my drive up to Seattle from Portland my gas pedal got stuck. The throttle body was closed so all I could do was idle along after taking the Castle Rock exit off of I-5. It caused a delay of about an hour and a half because I had no tools. I bought some stuff at the gas station and determined it wasn't that there was something stuck under the pedals. Nor was there anything wrong with the throttle cables. The cruise control servo was working as it should and after calling my buddy Kary, who I was on my way to see, we both came to the conclusion that it was a problem with the throttle positron sensor that was obstructing the baffle plate on the throttle body.

It turned out to be the case and I was able to get it back on the road. Has anyone else ever ran into this problem?

I know what the sensor does, but I don't know how it does it. Can anyone please describe the mechanics of how the T.P.S. works? Physically, what does it do?

89 Raider - V6, Automatic, rear LSD, A/C Retrofit, Cruise Control Retrofit.
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Re: TPS caused my Throttle Body to get stuck in the closed position. [Re: Jay Ayala] #1077541 04/03/15 01:07 AM
Joined: Mar 2005
Posts: 1,006
pcc Offline
Body Damage is Cool
It's a simple potentiometer. Changes resistance as it turns with the throttle so the 5 volt input is something less on the output depending on position.

Tells computer when you're on/off idle, when WOT, also tells computer how fast throttle is opened to give more fuel. With MAP/MAF and rpm gives computer engine load. Also can tell trans when to shift.

There's not much too it, mostly plastic with a spring, wiper, and windings.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles

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