Cylinder 1 contribution code - Ford Powerstroke Diesel Forum
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Old 08-02-2014, 07:04 PM
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Cylinder 1 contribution code

Alright I just did studs and went through the whole bending pushrod on nr5 cylinder. I finished up replacing the push rod today and get it fired up only to be rewarded once again with a new issue. Nr1 cylinder is throwing a contribution code and truck is running rough also truck is taking 2 crank cycles to fire up. My initial thought was air in system so I let it run a while and no change in injector issue or starting if left for longer than 10 min sitting off. Local parts store has new injector I am going to get in the morning to see what it does. What does everyone think about the starting issue? Also icp and ipr read good and ficm reads 48.5 starting
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Old 08-05-2014, 05:39 PM
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New injector and harness and no change in issue. Guess it's time to pin out the plug and see if it's actually getting signal to fire and then go backward from there on the electrical side
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Old 08-05-2014, 06:30 PM
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Make sure your FICM is plugged in fully. All three clipped tight.
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Old 08-06-2014, 06:02 PM
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Back two are clipped tight and no pin damage the forward plug seats but only hear one click. Took the injector plug off and used my fluke to go pin by pin with truck running and I'm getting anywhere from 21-31v depending on pin. Injector buzzes when key is turned on and it seems for same length if time and strength but that is just from feel since the scan gauge I was supposed to pick up today with the ford module was sold before I got there. There is a discernible knock on that cylinder and sounds like a 7.3 would with a bad #8 injector. Injector was torqued down to 27ftlbs when installed and end cap was removed and washer verified before install. So any ideas anyone?
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Old 08-06-2014, 06:05 PM
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Pull oil cap while running. How's the blowby?
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Old 08-06-2014, 06:10 PM
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Will have to check that tomorrow when I get home, what's the blow by indication of if excessive?
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Old 08-06-2014, 06:17 PM
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They say to flip the cap over and let it rest on the fill tube. If it blows it off you have a bad cylinder. Watch the white smoke and see if it's consistent. If it has a cylinder with excessive blowby it will chug like a train.
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Old 08-06-2014, 06:35 PM
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Smoke out the tail pipe is light or getting lighter the more I run the truck to trouble shoot the issue, but the smoke is constant and there is a chug to the exhaust note that seems to be consistent with all 6.0's that I've found videos on or have listened to in person with a bad or failing injector. When I had the heads off I inspected the cylinders and kept them clean while I was doing the job and everything seemed good. Truck never had this problem until I did the studs. I found one thread on a push rod that was bent a little and caused a contribution code in that cylinder and the diesel tech I'm working with on this problem has asked about a compression test of that cylinder which I have not done yet. The only other thing I can think of is a mechanical issue if all the electrical side looks good. When the push rod was bent on #5 exhaust I verified valve height on all cylinders to ensure I didn't have a valve that was not fully closing and all valves that I took a measurement on was at the same height.
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Old 08-06-2014, 06:43 PM
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Is the smoke through the exhaust white?


Sent from AutoGuide.com App
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Old 08-06-2014, 06:46 PM
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yes it is white and has more of a diesel exhaust smell than normal
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