Posted by DrewM on September 11, 2009 at 18:44:32 from (66.255.221.74):
I looked everything over like you explained on this Cat D4D 3304 engine. It's still running rough since I have not found the problem. I have the parts book, service manual, etc. and learned quite a bit. So far It seams #3 cylinder is not firing right. I have switched the injectors like I told you before. No Change. I rebuilt the Fuel transfer pump since it was leaking anyway. Thought maybe it wasnt getting enough fuel pressure. Even bought the tool to remove the injection pumps. I pulled the #3 injection pump and everything looks good to me. Nothing broke or missing. Even bought a new Fuel line for #3 injector. Am I barking up the wrong tree? I pulled the valve cover thinking there would be a broken spring. Nothing. The one thing I noticed is that there is a lot of white/blue smoke from the stack, and puffs of white smoke from the valve cover breather tube. Please help if you could. You have been a big help in the past.
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