Will the TPS cause the throttle to stick?

[Scappoose]

Yeah, still having that sticking throttle problem. The new TB is on the way, but I noticed that as soon as I shut the car down, the stick goes away. Can the TPS do this? Just curiousity at this point. Thanks.

[Unit 5302]

In a word, no. The TPS has no motors or devices with the ability to move the throttle.

What do you mean by, throttle sticking? Is is just hanging at 2000rpm? If that's the case I would be much more inclined to blame the IAC solenoid. It's the cylinder shaped device located infront and connected to the throttle body. If it's truely sticking, the only device that I know of on the car that is capable of directly controlling the accelerator pedal itself is the cruise control.

[Scappoose]

Here's basically what I had posted a couple of weeks ago:

My throttle is sticking, bad. It’s not electronic, it feels mechanical. When I press the pedal, there’s a lot of resistance, then pop, it opens. I checked the linkage, lubed the cable and lever on the throttle body and it still does it. Here’s what’s weird, when it’s cold, it operates freely, then as the car warms up, it gets worse. Then, usually, it will get better and free up. If I drive it longer, it gets sticky again.

Already cleaned the EGR spacer, the IAB and the throttle body. My 91 has the decal that says "don’t use solvents or cleaners" on the TB. I didn’t. I used a rag (and believe me, this took a while). I remember reading somewhere that the butterfly was ceramic coated to reduce sticking. Can the ceramic wear off? Had someone possibly used cleaner and when I cleaned it off I removed the natural lubricating properties of the gooey buildup?

It would make sense that as the motor heated up, the metal expands enough to stick, then when the thermostat opens, it cools it off enough to free up the mechanism until it heats up again and sticks. Does this sound familiar to anyone?

Since then, I've been told it was teflon. Regardless, it seemed odd it would stop sticking when the car is shut off. I'm more curious than anything.

[PKRWUD]

The TPS applies a light spring loaded tension to the throttle, but it is exactly the same whether the engine is running or not. The description you give sounds like the engine vacuum itself is what you are having trouble overcoming. There should be a small hole in the middle of your throttle blade. Check and make sure it's not plugged. Next, try adjusting the idle screw in (count how many turns so that you can put it back afterwards) and see if that eliminates the problem. If it does, then you have a problem with your idle circuit, and your IAC valve.

Take care,
-Chris

[Mach 1]

did you manually inspect it while removed like I suggested earlier?

If it is binding in the closed position, and your TB is spotless, then make sure the screws on the butterfly (or rivets) are not loose.

[Scappoose]

Originally posted by Mach 1
did you manually inspect it while removed like I suggested earlier?

If it is binding in the closed position, and your TB is spotless, then make sure the screws on the butterfly (or rivets) are not loose.

Yes, I did. Everything looked good. So I walked in the house and said, "Honey, guess what? I need a new throttle body. Or else I'm going to have to drop you off at work and take your Eddie Bauer Expegasguzzler." Boom. We could afford it. I'm going to try that approach on the rims, too.

PKRWUD, I'll try the idle screw fix. The hole in the butterfly is clear. Thanks.