I don't know how to describe it but the truck is difficult to start and when it does it seems to be starving for gas. At first I thought it was the fuel pump but when I got it going it seems to run in a 'choking or vibrating' mode while on gear but 'purr's like a kitty' when or neutral. Any ideas of what might be wrong or what to check? Appreciate it.

 

Have you done anything to the truck lately like a tune-up or such?

 

No I haven't. I am checking the plugs today. Hope that is the answer.
Thanks for your reply.