DTC P1668 and P1670 indicates that a communication error has occurred between the PCM and the IDM.
Open fuse IDM relay
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit IDM powering circuits PCM
Check for other codes
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no other codes. I changed around the relays and the truck srarted, but now it has a short in it. The wait to start light flashes constantly and the lights in the dash flash. It's almost like you are turning the key on and off really fast.
01 F350 cc dually 6sp conversion
00 F250 2.6 puller
early 99 F350 2wd daily driver
Just for drill disconnect the fuel heater. They like to fail and short on out the PCM circuit but I have not read of anyone having this exact set of problems. I would also be checking out those relays.
1996 F250 Powerstroke 4X4 AUTO
DP-Tuner F-6 chip live tuned, BTS Transmission, Garrett 38R Turbo, Swamps Injectors 150cc, electric fuel,
Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs