Im having a hard time turning on the truck. It acts like it cold out but its not cold at all i live in sout texas. The 2 batteries , alternator & starter are good. I have to spray starter fluid to get it going & its getting harder to do that. When its on it runs fine. Please help & thanks in advance

 

Your vehicle has glow plugs and if they are not working you are very lucky because if they were, using starting fluid can cause some real problems for the vehicle and YOU !
Does the "wait to start" lite work at all? Has anyone checked the glow plugs?
With a 94 chances are pretty good by this time , none are working.
Also check the glow plug relay, common problem.

 

Does it smoke black when accel once it is going?