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Message: [QUOTE="yzmatt, post: 595301, member: 10169"] Ok so I had some injectors cups crack. Saved some money to fix them and do injectors and the works. Figured why not since I'm already at it. Kids needed something can't remember so there goes that money. Saved again and house needed something else. There goes that money. Finally I keep enough to do the cups. Rented tool from Clay, did cups, installed FRx (gold spring), rebuilt fuel bowl while I was at it, and did tymar mod. Let the cups sit when I did them and pressure checked them at 16 psi for a couple of hours to verify all good. No problems. Installed the injectors that came out (pretty sure they are stock by the numbers on top being so close in sequence) with new orings and copper washers. New valve cover gaskets and under vc harness, did the .50 cent mod while at it. Now that I'm trying to clean the cooling system of all the diesel it has started to really smoke white smoke. Like when you start up the truck in the morning when not all the fuel is being burnt right off the bat. Same but not stopping even at high idle and warm. It also has a weird miss/knock sound when cruising around 1650-1900 rpms. When turbo boosting and cruising no sound. There is 279,000 miles on this truck with original injectors. No engine light and the injectors seem louder then before. Do you guys think injectors have just had it? By the way when I bought the truck last year I had a mechanic check it out and he did a buzz test and said that #3 and #8 injectors weren't right. But had another check it a month later and he said there were no codes there sitting in the computer. It ran so good I had it checked again from the first diagnosis. Now here I am needing help. Does this sound like injectors to you guys? [/QUOTE]