sticking throttle

[waldo786]

When I take my foot off the gas, the throttle still seems to stay open and the engine keeps getting some gas. If I tap the pedal a time or two it stops giving it gas and you can see the rpms drop down to where they should be if not getting gas. The previous owner installed one of these:
1984-87 TPS-TEC
The TPS-TEC INCREASES HORSEPOWER, REDUCES DETONATION AND MAXIMIZES PEFRORMANCE! The TPS-Throttle Enhancer and Calibrator increases horsepower by optimizing the throttle signal sent to the computer (ECM) of your fuel injected engine. Once installed, the unit interprets the throttle signal going into the computer and enhances the signal at a precise point within the engine's throttle range. The electronic circuitry then signals the engine to deliver optimum fuel delivery and ignition timing, assuring maximum horsepower! The TPS-TEC simply plugs into existing wiring on the engine and operates automatically. A 15 minute installation for seat of the pants performance you can feel! Also available for other models. Please specify make and model when ordering.
Could that be a problem, or do I need to adjust my TPS or do I just need some slider on my throttle? Any ideas would be appreciated.

 

[Quick6'n'-K.C.]

I would check the cruise control cable to see if its binding.
Just take the cruise cable off from the throttle body and see if that helps.

The TPS-TEC will not cause this issue that your having.

If its not the cruise, then take the gas pedal cable and the tv cable, DONT START IT, and ratchet the throttlebody open and closed, see if its the cables or the actual throttlebody
BW

 

[turbo nasty]

I honestly think those things are worthless, it fools the computer. And see no gain of the ecm seeing wot voltage before the throttle plate is physically in the WOT position.
I would think it would contribute to an overly rich condition.

Take it off and try it.
I also agrre on the cruise control cable check out

 

[84BuickGNYorkPA]

Clean the butterfly valve in the throttle body, this is a classic symptom of carbon on the valve. At least this is what I always found in the past with my GN. Start it up and spray it good, follow the directions... of the carb cleaner or throttle body cleaner. This is mentioned as part of the spring cleaning artilce at the other web site. Hope this helps,
Chuck

 

[waldo786]

Thanks everyone, I'll be tinkering with those options when I get a bit of time.

 

[GNBeswick]

Ya.....I bet the problem is the IAC. Same thing happened to me, cleanedd it out and it worked fine.