i recently purchased a 92 f150 4x4 ext cab and the first couple days i had it , it ran good until one day all it would do is crank and crank but not fire, it had fuel and spark. i puton a new coil. plugs, wires, cap , rotor, new battery. i thought that would solve the starting hard problem but it didnt. it only likes to start like it should when its either colder outside or the engines sat a long time like overnight. im thinking that the computer isnt coming out of closed loop and its richining the fuel mixture all the time and its wanting to flood out. also now after it warms up it wants to idle rough and stumble a little. i checked the codes and nothing came up , also the check engine isnt on so i was wondering if its the pcm? is there a way to test it? i also puton a new ignition module and that didnt help any suggestions would be greatly appreciated, thanks everyone.