Hey I’m having problem with my truck missing and check engine light after it is at operating temp. The truck is 1992 f150 it has a 306 , gt40p heads . B303 cam , mass air conversation 30lb injectors , all of it only has maybe 250 miles on it . Ignition system and sensors are all new . Ignition timing is set at 15* initial. Please help I’m pulling my hair out here.