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Silverado p0300 code

This topic contains 1 reply, has 2 voices, and was last updated by Nightflyr * Richard Kirshy 1 month, 1 week ago.

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  • #963111
    danny
    danny
    Participant

    Have a 05 silverado had the 5.3 in it has a p0300 code mupital random cylinder misfire code can clear code truck runs good unit reach about 40 mph check engine light flash same code runs horrible hhave put new injectors new coils new plugs&wires iintake gaskets new fuel pump 02 sensors have cchecked all grounds no vaccum leaks that can find any suggestions would be greatly appreciated lost on what could be the issue

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  • #963112
    Nightflyr *
    Richard Kirshy
    Participant

    Just a thought …
    Possibly:
    Faulty fuel pressure regulator.
    Faulty cam / crank sensor.
    Faulty O2 sensor(s)
    Partially clogged cat

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