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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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I have a 2011 f550 in our shop and it had dropped a valve

Customer Question

I have a 2011 f550 in our shop and it had dropped a valve and ruined the engine. We got a low mile used engine that was mostly drop in ready. Today we got it running and it stays in limp mode with no codes. Speed limited to around 5mph. We looked over everything many times and cannot find anything unhooked or unplugged. We tried doing a manual regen and it will not complete it. The scan tool stated that the particulate is plugged. Since there are no codes where the heck do we start on our diag. The truck was running perfect right up until it blew up. Please help.
Submitted: 1 year ago.
Category: Ford
Expert:  James replied 1 year ago.

Hello, if you can't get it out of limp mode I would recommend having the PCM updated. Do you get a error for exhaust fluid at all?

Customer: replied 1 year ago.
No, no def fluid errors at all
Expert:  James replied 1 year ago.

Do you have an IDS scan tool?

Customer: replied 1 year ago.
No I don't own one. We use a snap on solus pro. But I do have access to an IDS
Expert:  James replied 1 year ago.

With key on engine off does egt 12 read the same as the others?