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E30 M50nv swap, o2 sensor rough idle

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    E30 M50nv swap, o2 sensor rough idle

    Hello guys

    I Know this would sound weird, i had my E30 swapped with an M50b25 NON-Vanos engine, been tracing a rough idling problem ever since.

    What would sound weird is that i was checking for an O2 sensor and found NOTHING, no O2 sensor in the exhaust pipes or its Plug from the engine side.

    If anyone has an m50nv in his vehicle can you guide me to where i can find the O2 sensor plug ? Because i cant even seem to find it, And how many sensors should i be using ?

    Other than that, would an Evap purge valve installed in reverse cause a rough idle ?

    Thank you !

    #2
    Any answer guys ?

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