HELP MY BABY WONT RUN THROWING PO1668 IDM PCM COMUNICATION PROBLEM
it threw the CPS code first I changed the CPS and it now has the other codes Help I'm stuck how do I test the idm all the fuses are good and the relay is good I believe I switched with another one please help
341,000 miles I love this truck

 

Moved to the 7.3L forum.

 

TTT

Did you get your issue resolved? I am having a similar issue.
1999 E350 7.3
no start
failed injector buzz test.
P1668 or PO1668

Thanks