i have a 1987 f250 diesel with a 6.9 idi non turbo. im having a problem with it dieing we put a new ignition switch in and it helped the problem but when before it was dieing while driving now it only dies when im either shifting (its an automatic) or turning arround in a parking lot. im pretty sure i has to be electrical because i put a jumper wire from positive terminal on the injection pump to the positive on the battery and it never died. HELP!!!!!