Very interested to know what you did to solve the limp mode problem. I have the same problem with my 94 IDI turbo. Would love to hear how you solved the problem...thanksTruck not registered yet, conversation with dealer was over the phone, I was trying to get a schematic for the wiring due to many butcher jobs in past and having and issue with maxi fuse 22 blowing. When he asked me about the maxi fuse he stated it was likely the ECM, I said I thought the motor was not electronic, He said it was definately electronic. Maybe he didn't understand I said 1993 but I was pretty clear on that. Anyway I have solved most of the wiring issues, tach ,and tranny in limp mode. Anybody know where to get a good all around manual for 93 F450 also I'll take a shot at posting my first picture, I now have the avatar working, here goes!