Ok just started the ol truck a little bit ago to come home and one of my friends were in front of me so of course i couldnt let him get to far so i just started and took off, mashed it comming out of the yard and is sounded like it was missing, like a gaser a quick missing. I jsut thought it was cold. It did it all the was home, 10 miles or so when ever i got on it. Also ONLY when i had the tst box on. When it was off it wouldnt do it. Could it be the filter? Ive got 96,000 and just replaced the vp 500 miles ago and the lift pump to. The fuel pressure guage read 8 at WOT and 14 idle. ANY HELP. OR THOUGHTS. Thanks