I just got done trouble shooting my engine as i had a burned through wire that was misfiring on my header. Engine runs much better now. Timing is unknown where it is set exactly, but is set close and runs decent. Carb is a quadrajet and about 2 months old and ran for less than a month. The truck has trouble starting and idling when cold, it dies if i dont hold the gas slightly while going from Park to Rev or drive. The carb does need adjusting more but works fine sometimes and idles at start fine, or other times it just wont stay running. Driving the blazer it runs fine and has no problems. But once it gets warm and the gas pedal has been depressed for quite a while, the engine cuts in and out. It goes from rumble, no noise, rumble, no noise, rumble. Literally nothing like it died and kicks back in. If i dont let off the pedal it bogs down and looses speed as it tries to stop running. But if i let off the gas and let it cruise along, No cutting in and out while im off the pedal and if i wait about 5 sec. i can give it gas and not have any problems eigther for the rest of the night or It will come back about 2 min. later. Im totally lost on what it could be, i know nothing about carbs, and the last engine guy i told this to said nothing to me as to what it could be or what to fix it. Any clues? Im hoping i can take it to the shop that is working on my 95 silverado and maybe they will know.