IQA on 6.7 injector.
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You need to update the PCM/ECU with the IOA code on the injector. Sounds like you need to find a new Ford service dept to visit.
Read the two 6.7 books here. It gives info on the engine and injectors. One is for the 2011-2014 6.7 and the other one is the updates Ford did in the 2015 and newer 6.7. Check page 60 of the 2011 6.7 book. You might want to show it to your service departments.
Coffee Table Books
Also, have the service departments check the following service procedure section for the 6.7 Ford Workshop Manual/DV
SECTION 303-04C: Fuel Charging and Controls — 6.7L Diesel
Then have them read paragraph 3 of the installation procedure...
NOTICE: The PCM is programmed with an IQA code for each fuel injector. If a new fuel injector is installed record the new fuel injector IQA code and cylinder location.
NOTE: If a fuel injector is being reused, make sure to install it in the original location.
Read the two 6.7 books here. It gives info on the engine and injectors. One is for the 2011-2014 6.7 and the other one is the updates Ford did in the 2015 and newer 6.7. Check page 60 of the 2011 6.7 book. You might want to show it to your service departments.
Coffee Table Books
Also, have the service departments check the following service procedure section for the 6.7 Ford Workshop Manual/DV
SECTION 303-04C: Fuel Charging and Controls — 6.7L Diesel
Then have them read paragraph 3 of the installation procedure...
NOTICE: The PCM is programmed with an IQA code for each fuel injector. If a new fuel injector is installed record the new fuel injector IQA code and cylinder location.
NOTE: If a fuel injector is being reused, make sure to install it in the original location.
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I wish I had a actual Ford manual pic of it explaining it. The Coffee book thing above does say it but it's not official stuff they should be using in the shop. It would be more fun to walk up to them with the exact page on the manual they should be using and showing it to them instead of saying I have buddies online that claim to know more then you do as a dealer.
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