Legacy cold start plus intermittent engine stops

Discussion in 'Subaru Legacy' started by Steve, Dec 27, 2006.

  1. Steve

    Steve Guest

    I have a 92 Subaru Legacy that runs very well in mild weather but has
    developed cold start problems during the last couple of years.
    Anything below 25 degrees Fahrenheit and the car will not start. It
    cranks fine under all conditions, but when below 25, the engine doesn't
    start. I've changed cam shaft sensor, engine temperature sensors three
    times, plugs, wires twice, coil and just last week let the nearest
    Subaru dealer install new fuel injectors. They indicated that there
    were no codes and that fuel pressure was dropping off quickly which
    suggested problems with the fuel injectors.

    Unfortunately to this point, nothing has fixed the cold morning start
    problem.

    In addition, after the recent fuel injector installation, the car
    engine is periodically stopping while being driven.

    The car idles fine but while underway, the engine just stops for about
    1/2 a second then resumes normal operation(the interruption in power is
    enough for your head to bobble). No alarm lights come on on the dash
    when this happens. The only instrumentation signal is in the tach
    which shows rpms dropping about 600 before returning to the previous
    operating level. These events occur at various speeds, 25 mph or 60
    mph, from a start or while underway at highway speeds.

    I can live with the cold start but the period engine stops is
    dangerous. Last week I was pulling across a lane of incoming traffic
    when it hesitated.

    The car has 168,000 miles and has been well maintained over the years.
     
    Steve, Dec 27, 2006
    #1
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  2. If your car is equipped with a MAF sensor I'd suspect that as one
    possibility.

    Carl
     
    Carl 1 Lucky Texan, Dec 27, 2006
    #2
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