I have a couple issues I am hoping to get some direction from other peoples issues and problems. First off the truck has very little throttle/acceleration, the motor will not rev quickly when you burp the peddle. I have pulled open the MAF box, however this truck has a big butterfly, no real MAF. Please help, I have changed plugs, wires, cap and rotor and air and fuel filters. I have just realized that I forgot the pcv valve. I have looked to no avail for any vacuum leaks. One thing I find really weird is that the truck will not stay running without the airbox connected. The other problem I am having is with the Trans slipping out of 1st when we first roll from a stop. Shifts through the other gears no problem. Thanx in advance for any help you can offer.