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Thread: Back pressure torn flex pipe

  1. #1

    Array
    Status
    Offline
    Join Date
    03-15-2016
    Posts
    17
    Location

    Spanaway, WA
    Vehicle

    1990 Mitsubishi Mighty Max
    Engine

    4G64

    Back pressure torn flex pipe

    So my flex pipe tore and I think it might be causing low back pressure
    but I'm not sure some of the things that are happening are sounds like misfires when you press the gas and has trouble getting up to speed but if I unplug the mass airflow sensor it will get up to speed fine just is really tough at idling could the torn flex pipe be the cause of this

  2. #2

    Array
    Status
    Offline
    Join Date
    06-15-2014
    Posts
    2,244
    Location

    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    No or little back pressure will mess up exhaust gas scavenging + the exhaust pulse will be diffusing through the split in the flex joint. Whether or not it will affect readings from the MAF I can't say for sure.

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