my truck was hesitating really bad and started bucking and running like crap and now it just wont even start... code 14 says there is no igf signal to ecm... i have changed the cap,rotor,plugs,wires,ignitor,coil, and o2 sensor... it still says no signal.. ive talked to a couple mechanics and they said maybe distributor, or ecm... Anybody have any suggestions i am lost and getting pretty burnt out. Thanks any help would be greatly appreciated!!!