Truck\'s almost undriveable? The short version is my truck idles irratic when warm and it stalls out while driving. It takes a few tries to get restarted but I have to hold the gas pedal to the floor. Also today after restarting it was idling at 1800 rpm's. I'm out of ideas, I've replaced almost everything except ignition, computer and MAP sensor. Anyone have any thoughts? Here's a list of everything I've replaced in the last 3 months: - Rebuilt top half of engine - TPS Sensor - IAC sensor - Oxygen sensor - Spark plugs, wires, rotor & cap - Temperature sensor - Fan switch/sensor - Fuel & intake filters - checked vacuum lines - checked timing - checked fuel pressure regulator HELP!