how to diagnose p0264 what ive done now - Ford Powerstroke Diesel Forum
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Old 09-14-2013, 12:55 PM
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how to diagnose p0264 what ive done now

so put my truck from the canned sct tune "tow +50hp" tune back to stock to try my very first custom tune... and wanted to drive around for a few days before loaded looney and this afternoon after i got done with another scuba class, had my check engine light on figured it was the egr code because of my delete, and returing to stock programming but my curious nature wanted to check anyways...

p0264 low injector circuit - cylinder 2

my ficm was replaced last month sits at 47.5-48 always
new batteries and alt last month
had: headstuds, egr delete, new oil cooler, stand pipe, dummy plug, passenger side glow plug harness and a bad body mount replaced about 6 months ago...
truck runs great, no misses, surges, rough running, smoking, starts like normal

where can i find a wireing diagram to follow the #2 injector wire back to ficm and check for shorts etc... having trouble online.

thanks guys i really wanna try looney but gotta fix it lol...
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Old 09-15-2013, 06:03 AM
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To be honest I've seen quite a bit of Injector circuit low codes even on brand new or rebuilt injectors and its nothing, it could be something but if the truck is running ok I'd clear the code and drive it, if it comes back then dig in but usually it's just a blip with no actual issue.. Just my .02.. Load that looney and hit it!
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Old 09-15-2013, 06:29 AM
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ok sounds good. I loaded looney tune and wow!!!! it only puts out a little smoke but really throws ya back in the seat haha. Just made me nervous since im about to tow a camper 5hrs round trip since i got the 4 dr truck haha.

thanks again for the vote of confidence its what a friend said too but im a "trust but verify" guy lol..
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Old 09-15-2013, 08:01 AM
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my general procedure with codes when there isnt an obvious issue is to write them down then clear them, then ill either do a self test with the scan tool or just drive it and see if any come back.. these trucks will store codes without setting off a light so they can stock pile up in the codes menu, sometimes its hard to know which are new or old. each years are different too, ive had some trucks set off a CEL with the EGR deleted in stock mode, others just store a code with no CEL. clear the codes and start fresh, if theres an issue they will come back!
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