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Message: [QUOTE="TARM, post: 462913, member: 578"] I think what also needs to be considered is that when he disconnects the ICP sensor it fires up but when its unplugged it does not. New ICP sensor same thing. Wires good. Other than the off chance he got two bad sensors I would think this further supports worn injectors. Run a buzz test and contribution test to start with if you have or can get a scanner. Then pull the VC and see what's what. My guess @ 150K is worn poppet valve or seat maybe worn armature. The oil is especially when its cold and thick in not flowing thru the poppet and thus no start. Unplug the ICP sensor higher pressure forces more thru. Try plugging in the engine warmer for a couple hours and see if it starts up. Dave @ Swamps put out a good tech paper on diagnostic for injector issues. Here is the link: [URL="http://www.swampsdiesel.com/files/7.3LInjectorDiagnostic.pdf"]7.3 Injector Diagnostics by Swamps[/URL] Seems to fit your symptoms especially with it turning colder out add in. Poppet or Armature doesn't really matter to you as both mean injector rebuilds or replacements. [/QUOTE]

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