High Idle

[TAP]

My 560 sat over the winter because of an unusually cold winter here in Florida, plus the starter went out. I had it towed to a local shop for replacemnet. When I picked the car up it started and ran rough for a bit and then leveled out. As I headed home I noticed the car would not idle down. It was running a constant 3000-3500 rpm. I had to ride the brakes to maintain a safe speed. When I got home I removed the air cleaner and tried to move the throttle linkage by hand - it was very stiff. I took a can of WD40 and sprayed all the linkage connections and worked them by hand several times. Problem solved. Thought this may help someone out.

[230/8]

Nice that you found you problem without having to shell out any serious money. WD40 will free up sticky things but then it will dry leaving behind a rust-proofing film and little if any lasting lubrication. If the problem returns you might give those linkage joints a drop or two of ATF which should last a very long time.

[TAP]

Thanks. The initial treatment was more of a diagnostic than a repair. After it stopped the binding of the linkage I had already decided that after the WD40 "dried" some, I would come back with some white lithium grease. I'll get it done this weekend along with a good clean up.