Stuck Throttle???

[PowerDispatcher]

While driving my Ex this morning on a few errands ('92, 4.0 auto), the truck drove fine after it started, but once the engine RPM got to around 2300, it *stayed* there, and would not come down. I put it in park, and the RPM rose rather quickly, so I turned it off. Any ideas from the fine folk here as to how I should proceed? Assume I am reasonably mechanically and electrically inclined...but have very little experience under the hood. Thanks in advance for any help or ideas.

John

 

[J. Kennedy]

check your throttle body. There is probably 12 years worth of grease, grime & crud all over the linkages. Spray it all off with throttle body cleaner.

If that does not work, you may have to pull the old cable from its sheath , lubricate and replace.