Rough idle P0266 code with brand new injector installed. - Ford Powerstroke Diesel Forum
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Old 06-18-2012, 05:12 PM
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Rough idle P0266 code with brand new injector installed.

4000 miles ago I installed all new injectors. Last week driving down the road she started running rough sputtering then died. I towed it home and had P0266 code so I pulled the injector it was burnt pretty good and copper washer was gone so was lower oring. I got a new seal kit cleaned the injector it would run but smoke like crazy and still had code. Pulled that injector and got a new injector installed it and started it up same thing P0266 rough idle and white smoke. Can I pin out the connector and check voltage to the injector? If so what should it be? FCIM voltage is at 48v +/- .5 so that is good. Im at a loss with this
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Old 06-18-2012, 05:16 PM
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p0266 is contribution code, or circuit fault? well, how was your injector cup? when you pull out the injector does the bottom of the cup look bad. if you were running it without the washer than there is a good chance the cup could be damaged. but also what is your fuel pressure? what was the reason you replaced all the injectors?
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Old 06-18-2012, 05:35 PM
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#2 contribution/balance is P0266

I had #2 & #3 contribution codes and exhuast gases into fuel rail so I changed all 8 to be safe. It ran great with no issues until the other day. The injector cup looked good to me I cleaned it best I could.
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Old 06-18-2012, 06:11 PM
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you'r cups were free of little scoring marks and dents in the bottom? what did they find as the original reason for the combustion gases entering the fuel rail?
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Old 06-19-2012, 05:59 PM
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I didn't notice anything. I'm not sure I sent them in and got replacements I never asked how many were bad out of the 8. I replaced them and the issue went away until now. I will check fuel pressure again tomorrow. There was air into the fuel system last time....maybe the issue wasnt injectors after all. I just need to get this thing fixed ASAP these break downs are getting old.
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