Yeah I've tried that before, but thanks for reminding me about it. I just tried it while bypassing the cold start switch, it didn't work. I'm to the point that I'm trying multiple things at the same time now. the body does have 250,000 miles, it may be multiple problems. Do you happen to know of any other diagnostic points or sensors on the truck that I should look at? By the way, 4Crawler, that is an awesome page. I have referred to that page many, many times. <img src="/forums/images/graemlins/cheers.gif" alt="" />