Join Date: Feb 2009
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The most important thing to do is when the truck is stone cold, first start of the day, listen to the truck. Open your door and turn the key maybe with your head out the window. You are listening to the tick of the injectors. If the tick sounds strange, or there is no tick at all you either have a FICM that is on the way out, you need the latest Ford calibration, or there is some other issue at play. Last winter I replaced probably 10 FICMs due to dead inverters. That ticking you hear when you cycle the key on is the FICM doing an "inductive" warming of the injectors to help cold starts. What happens usually when you lose that tick is the 48volt inverter in the FICM is dead. Ford released a updated calibration that helps save the inverter and sometimes on rare occasions can bring a bad FICM back from the dead.
5 Year Ford Certified Diesel Master Technician
Specializing in: 6.0, 6.4, 6.7, and 7.3 Powerstroke Diesel
Currently Employed as a Diesel Technician for the
Walt Disney World Resort in Orlando, FL.
Specializing in: Detroit/Cummins/International