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I have 2 problems with my 94 7.3 powerstroke. Problem 1. it has an intermittent and varied rough idle let me explain I start it up an let it run for a few minutes and while it is cold it runs fine but when it gets warmer it develops a rough idle but it varies in degrees of rough, for instance at one stop light it might feel like its running on about 6 cylinders at the next light you might not hardly feel it. It is completely stock. no mods except the EBPV delete. Problem 2. the engine runs with no power loss that I can detect but when I try and hook up a scanner to it there is no communication to the PCM there is power to the OBDII port but I have tried multiple scanners the latest being a snap on scanner my friend who is a diesel tech for Ford let me use but same result. Any help is appreciated.
 
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