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Stalling and stalling..... V70-XC70

My 2004 v70 was purchased certified used and has a stalling problem. What I noticed initially is the car would stall out when I came to a stop on extremely warm days where the AC ran hard, and restart easily, but idle very rough and stumble as if it starved for gas. Eventually it would settle out. It stored no codes. At this point the car was due for plugs and I replaced them (50k miles). It also stalled when I turned right through water over the road during or after a strong storm.

Under normal driving I found the idle would drop below 500 rpm when I came to a stop then bounce until it settled in the normal range. The car would be sluggish from a complete stop. It stored no codes. After several visits to the dealer for service they replaced the fuel pressure regulator. It made no difference. They reprogrammed the transmission, and this made no difference.

I've taken the car to the dealer at least five times....it never stores a code and they never find anything wrong.

About a week ago the car was at 99,970 miles (30 miles left on the warranty) and I drove through standing water and it died. It restarted and I drove it right to the dealer. They said they found a code but were not sure of the cause and would need the car for at least a week. They gave me a loaner to drive.

Today they called and said the car was fixed. The engine control unit was going into failure and was replaced. I asked if the replacement part was new or reconditioned and they told me it was new and had a 12 mo. 12,000 mile warranty. I am picking up the car tomorrow.
--
I'm stuck on Volvo and Volvo's stuck on me....








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    Stalling and stalling..... V70-XC70

    Look under the car and see if the air guide/splash guard is missing. Then look inside the right front wheel well and see if the service flap in the inner fender is missing. Going through a puddle is not supposed to bother the car.

    The ECU is a very expensive part, tell the Volvo dealer THANK YOU.
    --
    My name is Klaus and I am a Volvoholic.








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      Stalling and stalling..... V70-XC70

      So...a Happy Ending then?








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        Stalling and stalling.....happy ending V70-XC70

        They did not replace the engine control unit, as I stated. I wrote my post prior to picking up the car. The technician explained, when I picked up the car, that the block that connects to the ECM had failed. He said he has never seen a Denso ECM failure.

        The technician explained that when he tried to download software the ECM would not take the upgrade. He said the CEM failed during the download. He replace the CEM and reloaded the software but the keys would not program during the SW download. He reinstalled the key application software in order to reprogram the keys.

        The work order listed these parts:

        electronics box (30657629-9)
        CEM reload (9494722-3)
        antenna (8621509-2)
        ecm gasoline up (30677021-5)
        ignition key ap (8633525-4)

        The idle is perfect, or so much better than before that I can allow for any minor glitch. When I come to a stop the tach bumps very slightly when it gets to the low end range and holds perfectly. The take off from dead stop is smooth and powerful...
        --
        I'm stuck on Volvo and Volvo's stuck on me....








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          Stalling and stalling.....happy ending V70-XC70

          Hello, Happy day for you! ! Can you tell us (or find out) what that bill would've been had there been no CPO coverage? Thanks, Kira








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            Stalling and stalling.....happy ending V70-XC70

            No, I can't.

            I can tell you that in addition to the 'parts' listed, they also showed a total of two hours labor....including diagnostic time and installation.
            --
            I'm stuck on Volvo and Volvo's stuck on me....







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