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Power Strokes
7.3 Tech
7.3 cylinder 3 contribution fault nightmare.
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[QUOTE="Bustedknuckles, post: 1420076, member: 2197"] I was chasing a cylinder 3 contribution code that would sometimes move to cylinder 5 and loud slightly rough idle on a 7.3 after a engine rebuild and new injectors and finally got it fixed. I ohmmed the wiring, swapped injectors around, put in 2 new cam sensors from Ford, did a cranking and running compression test , swamps IDM, ohmed all the wiring, new tuning, new uvc harnesses, graphed iniector firing patterns with a lab scope, etc etc and finally told him he was going to have to run it through the shop as i didnt have time to work on it in the evenings any more. He took it to a friend of mines shop since it was closer and he re-did everything i did plus measured pushrod travel, swapped engine harnesses with a known good one, put a cam sensor out of another truck in and put clear fuel line on the return to check for air bubbles. After striking out on all that he ended up getting a cam sensor from Advance Auto Parts and it is fixed. Just thought I'd post this for anyone else who runs into this issue! [/QUOTE]
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7.3 cylinder 3 contribution fault nightmare.
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