93 villager surging. tps?

I've replaced all tune up parts. Smelled gas when cold found leak in hose so I fixed. Cuts out around crusing speeds. pulled off throdle plate and cleaned was really gummy. Seemed to be fixed but then started cutting out again. I just decided to replace TPS and it seems to run fine, yet how do I set the TPS as it is sloted, I just set it in the middle

I've replaced all tune up parts. Smelled gas when cold found leak in hose so I fixed. Cuts out around crusing speeds. pulled off throdle plate and cleaned was really gummy. Seemed to be fixed but then started cutting out again. I just decided to replace TPS and it seems to run fine, yet how do I set the TPS as it is sloted, I just set it in the middle

Here is a link for Factory Service Manual:

http://www.nicoclub.com/FSM/
scroll down to quest and click on it, pick year.

Go to section EF&EC page 167.

Hope this helps