o do this, with out turning on your radio or reciever start the truck if it goes full on ilde somthing wrong with the engine. but these engine when you prime them you get alot of fuel in the engine and when you start the engine revs high even on idle to burn the fuel out when you start try to start it and if it goes to full let is do it for like 3 secs and if it dont stop then its somthing with the rado