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Power Strokes
6.7 Tech
PO278 and PO306 codes and smoking
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[QUOTE="20156point7, post: 1560174, member: 16211"] You were right sir. Should have done a compression test to start with. My shop ran a relative compression test and cylinder 6 is showing low. Shop is saying it’s making a noise in the top end and could be a bad rocker arm. I am up to the task of pulling the valve cover off myself. This doesn’t seem like a very common issue with the 6.7s so I’m not sure if they are right or not. [/QUOTE]
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PO278 and PO306 codes and smoking
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