GTV6 Sticky throttle

[GeeTV]

The accelerator of my 84 GTV6 gets sticky when the car warms up.
Any suggestions much appreciated!

[Duk]

1st thing I would do would be to inspect the inside of the throttle body.
Take the pre TB plumbing off and look for any gummy deposits at the top and bottom edges of the butterfly valve and the bore. These are the edges that get the most air flowing over them during regular (part throttle) driving and so get the greatest amount of crank case gasses flowing over them that can leave the potentially gummy deposits.
If you see or feel anything, remove the throttle body and clean the insides with Carby or Brake cleaner. Don't try and clean the TB while it is still on the plenum chamber unless you plan to let the car sit for ages, otherwise you'll probably launch your plenum chamber into orbit. Or the underside of your bonnet.

If that doesn't fix the problem, are the GTV6's linkage or cable?
If it's linkage, carefully take it apart, clean the pivot points thoroughly and try lubricating the various pivot points with Silicone spray. Graphite lube could work well too.