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engine temp sensor

  1. ECT Sensor and AC Problems

    Repair & Maintenance
    I'm on the right track I think but a little help would be appreciated. I have 2 problems which I now believe are connected. The first problem is that when I turn the AC on (with the AC button) the RPM's drop by about 300-400 but they are supposed to increase when the A/C is engaged. Also after...