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volvo brain box question? 700 1990

when referring to a engine control unit what is the w/egr and w/o egr signify??








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    volvo brain box question? 700 1990

    EGR is a system to reduce NOx emissions by putting exhaust in your intake... "exhaust gas recirculation". I think it was a california only option. And I think it was turbos only. NA cars don't reach the high enough temps to produce NOx I think...
    -Will
    --
    1990 740 Turbo, on its way to stock specs, maybe beyond








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    volvo brain box question? 700 1990

    Exhaust gas recirculation.Not all models have it.If you use an ECU for EGR on a car not so equipped,a CEL will indicate a DTC.:)

    Bill







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