I have 1992 Rs 5 speed with a 305TBI. It has 130,000 miles. My problem is that the throttle is sticking while the car is running. The gas pedal becomes hard to push down at first but once i push it down a little it smooths out.

Its making it difficult to drive the cars correctly because once I let of the clutch the car is lurching forward. The car sat for a while before I bought it last week. I lubricated the throttle body linkage with WD-40 and worked the throttle while the car was off. I also noticed that the cruise control linkage (I'm guessing its a vacuum controlled cruise control) was not moving very smoothly. Could I have a vacuum leak? Could there be carbon on the throttle plates? I did notice that the gasket that goes from the air cleaner to throttle body is partially missing.

 

You deffinately could. Could have a worn out bushing on the throttle shaft. Carbon build up on the blades could cause a little stickiness. Id get the throttle body rebuilt or replaced.

 

What about putting seafoam in it ?

 

Nope. Did you try disconnecting the throttle cable from the TBI move the throttle by hand feeling for binding....if not they work the cable back and forth and you could feel a binding there..

 

Alright ,I'll try that out when it gets warmer outside.