[karlp]

I found the cause of stickiness in my car to be in the section between firewall and carb, Something about the routing it was forced to take. All the lube in the world would not fix it. I cut the end off the cable and replaced the casing with a length of steel brake line of the correct length. Compression fitting onto the tube coming out of the firewall.
Smooth as silk!!
Only draw back is having to get a "ball" back onto the carb end. I used a little bolt with a hole through it off one of the Kids bicycle brakes.

Hope it helps!

Karl