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Power Strokes
94-97 Tech
#7 injector issues plz help diagnose
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[QUOTE="m j, post: 718979, member: 9848"] did a long trip this Canada Day weekend. went from Vancouver BC to Grande Praire AB to Fort St John BC and home. truck started acting up after Grande Praire. first symptom was laboured starting. after loading a car on the trailer in FSJ I fueled and grabbed breakfast and coffee at Tim Hortons and went to pull on to the highway. CEL and motor starts chugging badly. so on the side of the road I start trying to troubleshoot. Torque app says "no codes stored" oil level is good and clean (changed 2 days before trip with T6 synthetic and a donaldson elf7405 huge filter) fuel in the bowl, filter fresh as well if I unplug the left rear valve cover connector it runs better and CEL is off so I pull the valve cover to inspect the UVCH. it looks perfect and DVOM says its good but I failed to check for continuity between the injector pins injectors 3.5ohms nothing looked 'bad' under the covers so I buttoned them back up. I pulled the pins from the harness connector and tried disabling 5 and 7 seperately. 5 disabled 7 connected motor ran rough like on six cylinders, 5 connected 7 disabled it smoothed out on seven cylinders, bothe 5 and 7 connected CEL and rough running at that point 1300km from home and having to be at work I pulled 7 from connector and hit the highway on 7 cylinders missed work on Tuesday and worked today. to me it feels like 7 is trying to fire out of time. having 7 connected the starter works very hard to spin the motor. I guess I have to try a few more continuity tests at the valvecover connector but everything there 'looks ok' so I guess the next place to look at wiring is back at the engine harness plug on the driver side? do injectors die like that? is it electrical? any help is appreciated Thanks Michael [/QUOTE]
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94-97 Tech
#7 injector issues plz help diagnose
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