So my truck will not idle when warm, if I put the gas pedal down too far it fludders out (like a chugging/stalling effect). I have an 1986 with the 22R engine, and I do not know if the gas lines are clogged, the fuel pump is failing, the choke pull-off is stuck, or the carb gasket is cracked. It is the frozen tundra time right now, so I don't want to spend anymore time outside than I have to. What is wrong with my truck?