Here is all the details i can think of. The truck was running great for months, I go on vacation and let it sit for about a month. When I return she starts right up and gives me no problems. That same day I pick up a set of new 35s and have em mounted. everything is still good. The next morning I am about to leave on a 300mile trip and the idle is very high and the mixture supper rich. I make a quick adjustment to the idle and mixture and a small advance on the timing. I continue the trip without problem, infact she ran great over the pass and all, just a little slugish off the line. By the time I get to my destination she is real sluggish off the line, sometimes. The next morning I can't get her to move at all, in low i can get her to budge and then take off. I make a small run, barly able to get going after a light, but it seems to get better with time. Once I get going it is fine. I tried to tune it up again but no luck. Help me figure it out. BTW. I am in the middle of moving and starting school and my computer is broke so it sucks now.