#4 Injector Line
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I to had the same problem with my #4 last week spraying fuel all over everything and it was a loose injector clamp. parts man said it was a common problem with the 5.9 so he kept a few in stock at 65. a pop. you get a new clamp and bracket with the new one and looks like they changed the clamp screw on the bracket.. mine broke where it screws on to the injector..truck has 93000 miles on it...