Intermittent knock and smoke 7.3
#13
#16
Its a possibillity that one of the o ring on an injector has rolled up from not greasing properly. another possibillity is that one of the hard lines from the filter bowl to the back of the head has a hole rubbed in it and is sucking air into the fuel lines. also check the plugs on your valve cover gaskets it is possible that they are burnt up in which the valve cover gaskets rhave the wire to your injectors as I'm sure you know
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