Stuck 6 Ports
 

My 90 GXL has stuck 6 ports and the 2 pots are operational as they go up&dn real easy.
But I can barely rotate shafts with a pair of vise grips. Would you guys recommend that I warmed up the engine and spray some wd-40 to make it easier. I thought about spraying carb cleaner down the little 1/4" tube directly above it. I've popped the little blocking plate held on by a bolt and philip screw, thinking I could spray some down the opening so I can pull out the entire shaft.
I've done this before on an 87NA by removing the entire intake manifold and fuel lines, but I figure the techniques mentioned above should save me a few hours of unneccessary labor.
Thanks again.

Hello. If you are only unsticking them to sell the car then this might work, however this will not eliminate the carbon that made them stick in the first place.
I tried to do this on my 87 RX7 but with no success.:(
I ended up taking the intake off and removing the sleeves and completely cleaning them out. I know this is a pain, but to make sure you are getting all the carbon out, this would be the only way. If you find another way that is better, please advise. :)
Have fun!

For what it's worth, I noticed after I decarboned my engine with water injection that the sleeves rotated much easier. I had tried adding fuel injector cleaner to my gas tank and carb cleaner in the throttle body but that didn't work.