22re Engine Problem

[92YotaPickup]

I'm having a problem with my truck after I drive it for awhile.
After I drive for awhile and then pull up to a light or stop sign and go to leave the truck hesitates and stumbles and almost stalls out. But if I press on the clutch again its ok but whenever I try to go it stumbles.
I have also noticed that when Im sitting at the light or stop sign at idle the voltage meter is vibrating at about 9-12.

Looked around the site a bit but couldn't find anything so if you know of a thread like mine just post the link please but I would really like to figure out whats going on with my truck.

 

[toy4xfun]

TPS maybe, sounds like what mine was doing for a while, then finally the Check Engine light came on. but there are a lot of things to look at, a good fsm has a trouble shooting guide in it, just look up what your truck is doing, then follow the guide.

 

[Bogo]

Engine coolant sensor?

 

[92YotaPickup]

Check the TPS in the summer when I did a bunch of other stuff.
Havent checked the engine coolant sensor yet, were is that sensor?