AA and AO Injectors in the Same Engine? - Ford Powerstroke Diesel Forum
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Old 04-03-2013, 07:01 PM

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AA and AO Injectors in the Same Engine?

What I'm working on: 1994.5 7.3, 225k+, 5 spd, CCLB

I am slowly working my way through the various tests for Cranks/Won't Start and removed the valve covers today. So far the only question I can't find an answer to here on the forums is that my engine has both AA and AO injectors (3 AA, 5 AO). Is this normal or a problem? Also, all eight seem to have different part numbers on the top. Is this actually the part number or no?

Thanks in advance!
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Old 04-03-2013, 09:02 PM


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I believe those are serial numbers, and as far as aa and ao, I've heard the early ones had ao labeled on them as well being the same stick, good luck
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