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stalling 850 850

We have a '94 850 wagon with auto trans. Owned it for almost three years, from 105000 to now has 161000 miles. The first couple of years, about 4 times a year, we would be driving along and the car would simply quit as if one turned off the ignition key. You had to sit for about 60 seconds before trying to start it, as it would never immediately restart. This stalling originally happened only in the summer heat, at varying speeds, load conditions, etc, so the problem did not seem dependent on any one event other than a hot day. No codes show for the car. Now the problem is occurring sometimes 3 times in a day, sometimes not for weeks and summer heat is not here for sure! So far it has always immediately restarted after the approximately minute wait and runs perfectly.

I have seen other early 850's advertised on ebay with this problem, which leads me to think it might not be unique to our 850. Have other owners experienced this problem and found a solution? The entire ignition system, cap, coil, wires, plugs have been replaced over time (the coil was a used unit tho.)

Any and all help would be appreciated! Jim Dworschack, Wisconsin








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    stalling 850 850

    I'll add to the other great suggestions.

    - vacuum leak - there are a lot of vacuum lines on these cars and they are responsible for a number of different systems. There is a mess of vacuum and PCV lines running along the back (driver's side) of the head/block and that would be my first place to check, along with the 'elbow' on the front (pass) side of the intake (hard to reach - way down under the intake)

    - transmission fluid - although it sounds like your problem is 'at speed', I was having a stalling problem when pulling to a stop, which seemed to go away with a trans fluid flush. I suspected the torque converter was failing to disengage the 'lockup' function when I was coming to a stop, and the engine would stall out like if you forget to disengage the clutch in a manual trans car. I was worried if that was my problem I was going to end up changing the solenoid(s), but it seems to be fine now (fingers crossed).

    --
    1998 V70 AWD Turbo 190k+








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    stalling 850 850

    This seems to be a common problem. My car did the same thing, 4 time a year over several years. The full pump relay did the trick. An easy fix. Check out this link.

    http://volvospeed.com/Repair/FuelPumpRelay.php








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    stalling 850 850

    Fuel delivery problems never set codes. Check this thread to eliminate one common problem:

    http://www.brickboard.com/AWD/volvo/1265592/850/way_isolate_falid_betwen_gas_pump_relay.html

    The fuel pump is in the tank and you can hear it prime when you turn the key to position II. When your engine stalls, try turning the key and listening to the faint humm from the back seat area.
    --
    My name is Klaus and I am a V ♂ lv ♂ holic.








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    stalling 850 850

    I don't have much experience w/ 850s, having just bought my first one 3 weeks ago, but if it is like other vehicles I have had I would be 90% sure it is the coil. Check the resistance of your coil, search online and you will find out how. Coils usually have problems only when the heat up or get really hot.

    Also, if you haven't done so lately, replace your plug wires, spark plugs, rotor and distributor cap.

    All of these things are pretty inexpensive and easy to do yourself and should be done as general maintenance items.

    Again, I would almost be willing to bet it is the coil.

    Good luck.








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    stalling 850 850

    Hi, having also 2x850-94 n/a, I could propose two to start with:
    1: fuel pump relay (nbr 103 / 50€) replacement, below cover in fuse box, diy
    2: electrical part of ignition key (haven't had a need yet)

    br Tapsa







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