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Discussion Starter #1
1993 SWB. Issue: engine revs won't drop after removing foot from accelerator. Had a trusted local indie Rover specialist replace throttle cable, however afterwards I noticed there was some "dead" travel in the pedal before throttle engaged. Also a sticky spot in the return pedal travel when releasing the accelerator.

It appears that the throttle doesn't return to its position flush against the plenum. There is perhaps a millimeter or two of space between the tab that should rest on the plenum and the plenum body. I can push the throttle tab down with my thumb and it will close the gap to sit on the plenum, but the mechanism doesn't want to go all the way by itself. I have cleaned and relubricated the throttle body, no improvement.

Underneath the throttle is a second cable that appears to act counter to the cable leading to the accelerator pedal. This doesn't seem to have as much tension to it as it should. It feels like if it was tighter it would pull the throttle all the way down to the plenum, but it just doesn't have the oomph. I can't see where this cable leads to and there doesn't appear to be a way to adjust it via a tensioner knob like the throttle cable has. Assuming this is the problem, what's the trick to getting the throttle body to return to its appropriate default position when releasing the pedal?
 

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1995-2002 Range Rover Classic
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the bottom cable is your transmission throttle kickdown, I have experienced the sticky throttle before. a little wd40 on the links has helped a lot. also clean the carbon in the plenum/throttle contact area.
 

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1970-1995 Range Rover Classic
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Don’t just clean the side of the throttle butterfly you see, open it all the way and clean the backside, including where it seats. That side is usually dirtier.
 

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Discussion Starter #4
SOLUTION!

I took my Range Rover back to the shop that replaced the throttle cable. Apparently there is some connection at a junction in the throttle cable at the firewall that wasn't completely engaged. They didn't let me into the work space to watch what they were doing and the tech's explanation was unsatisfactory ("These new throttle cables are kind of funky"). Something about a spring and a connection at the firewall. I would have liked to have learned what the fix was to expand my understanding of my vehicle, but they had the truck in and out in ten minutes so otherwise no complaints.

Now the accelerator pedal has instant response, there is no sticking, no revving, the idle drops to where it should be, and everything seems to be working fine.
 
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