The check engine light has never come on. I'm not sure if they have tested the throttle position sensor or for vacuum leaks.
Since my last post, I replaced the plugs and wires and still had the same problem.
The shop replaced both of the oxygen sensors and that seems make things a lot better. It is not running perfectly and although I have not experienced the same degree of the problem the engine does hint that there is still an underlining problem.
Now I have a new problem that started the day I turned it in the shop last time. About half of the time I try to start the truck, it cranks but does not start. I have to waiting a few minutes and try again.
Monday, November 2nd, 2009 AT 2:57 PM