Throttle sticking closed

1997 Riviera - 3.8 Liter, L36 - 141,734 miles

A minor problem has re-appeared.

From a cold engine (after sitting in garage for a day or two), I start-up and roll down the driveway using `cold-engine idle´ without touching accelerator pedal. Putting it in Drive, when first steeping on the pedal, it's stuck in the closed throttle position momentarily. There's a sticking or resistance to `first step´ on it.

Does that sound like a cable? or some throttle body issue? This has happened before, and Induction Service solved it, but that might have been just a cover story. :frown:

Is there a known condition? What needs lub or de-gunking?

Thanks,

-Ed

Sticking butterfly valve in throttle body. Had several different cars that did that. Almost felt like a stuck cable. On most, I was able to clean the throttle body without removing it. Put some towels under the throat. Pull intake hose. Throttle body cleaner or similar. Spray the throat. Let it soak a few minutes. Repeat. Carbon build up on throat and butterfly valve

Sticking butterfly valve in throttle body. Put some towels under the throat. Pull intake hose. Throttle body cleaner or similar. Spray the throat. Let it soak a few minutes. Repeat. Carbon build up on throat and butterfly valve

Excellent!

Thanks