Looking for opinions on replacing a bad injector. Symptons, rough idle and loss of power, service engine soon light comes on while driving but no codes set. Checked connector on valve covers and no burned pins. I ohmed out all 8 injectors (analog meter, batteries dead in digital) and 7 were all about 2/3 ohms, number 1 was very high (will recheck with digital to get actual resistance). I was assuming a bad solenoid or could it be in the wiring? If it is a bad injector would it be wise to replace all 4 on that bank while it is apart (170k miles). Any suggestions on quality remans? Mylex, Pensacola, Diesel Care, board sponsor, new Ford, other? This is a stocker used for daily driving and pulling a trailer. Thanks in advance
Bad injector, replace one or all 4?
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Yep, what he said.
You'll need a scan tool that will run injector buzz and cylinder contribution tests. You may be looking at just a bad UVC harness, so check closer before you commit to replacing one or more injectors. If it's really a bad injector, with your mileage, I might be inclined to go with 4.
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If you take the oil filler cap off you can smell in the valve cover for a burnt smell incase it is a burnt harness. The smell can travel in the oil even if other side of engine has burnt harness. This is not 100% true in all cases as you may not smell a burnt harness but if you do smell the burntness than yes you have a harness/connector burnt. If you ever take valvecovers off than you can check the harness / the oil spouts/the base of injector for bubbles which shows o rings bad on injector/poppet screw for being loose which causes bad miss. A scanner will help show things before pulling covers
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