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Chris, ASE Certified Technician
Category: Ford
Satisfied Customers: 294
Experience:  I am a Master Certified ASE technician. ASE Certs A1-A9 & L1. I have been a general auto repair tech for over 18 years.
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I have a 2002 ford f550 7.3 diesel & sometimes it

Customer Question

I have a 2002 ford f550 7.3 diesel & sometimes it won't start when I do a buzz test the injector won't buzz but I see my tach bounce up and down. If I leave the switch on for about 20 min and if I do a buzz test then I'll here the injectors come and the
truck will come on then. I got a used IDM module from a friend of mine yo try on this truck will this be a plug a play deal or will I have to flash it
Submitted: 2 years ago.
Category: Ford
Expert:  Chris replied 2 years ago.

Hello, This does sound like an IDM problem. They are "plug and play" without any programming.