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Engine stalls 700 1990

posted by  someone claiming to be myersnsoda on  Wed Jul 30 02:55 CST 2008 [RELATED]

My '90 740 wagon has begun loosing power, then stalls. It restarts and runs OK, then repeats stallout. Is this a vacuum leak or an A/C related issue? Or something else?








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    Dirty fuel filter did this to me 700 1990

    posted by  Volvony on  Wed Jul 30 18:05 CST 2008
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sun Jul 6 08:57 CST 2014
    [RELATED]

    When the crude in your fuel filter packs up against the filter element, your car might stall out. When the car rests, the crude loosens up a bit and lets the car run normally until it all packs into the element again. The problem was pronounced at higher RPM operation in my case. The fuel filter is located under the drivers seat.

    The only way I can think that your ac has anything to do with this is if the little relay that boosts RPM when you turn on the ac has failed so that you get rough stalling at idle. This relay is gray and found behind the glove box








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    Engine stalls 700 1990

    posted by  lucid on  Wed Jul 30 08:02 CST 2008
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    last visit: Fri Oct 24 12:31 CST 2014
    [RELATED]

    If this is a Regina FI car running the original fuel pump, it could be on it's way out. A fuel pressure test at the fuel rail schrader valve should show about 36psi at idle, and 45psi with regulator vacuum hose removed and capped off.







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