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BMW E46 320D Losing Power

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  • 01-10-2014 12:49am
    #1
    square ball
    Registered Users Posts: 392 ✭✭


    Hi guys. Sorry if there is already a thread about this.

    I bought a 2003 BMW SE 320D last week. The car had seemed to be running fine until I was driving on the motorway. I tried to accelerate past 80MPH and car suddenly lost power and barely had enough power to stay at 60MPH with my foot to the floor. The next time I turned it on the power had returned and was fine again until I went back on the motorway. Same problem again as I went to accelerate past 80MPH again. At the next roundabout I turned the car off and on again and the power was back once again.

    No lights came on in the dash and no smell from the engine and I don't think there was any smoke from the back either. Car had swirl flaps removed and new breather put in by previous owner and only done about 6,000 miles in the past year according to the NCT cert.

    I really would appreciate any help or info on what to?
    Tagged:


Comments

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    #2
    cock robin
    Registered Users Posts: 724 ✭✭✭cock robin


    It's just the car letting you know your breaking the speed limit, which is 120kmh (75mph)


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    #3
    Wheelnut
    Registered Users Posts: 977 ✭✭✭Wheelnut


    One possibility is that the turbo is over-boosting and this is being detected by the ECU which puts the car into "limp home mode". Switching off the ignition cancels this signal so the car is back to normal at the next start. The over-boost could be caused by a sticking actuation lever.


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    #4
    burke027
    Registered Users Posts: 501 ✭✭✭burke027


    Is it a auto r manual firstly


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    #5
    square ball
    Registered Users Posts: 392 ✭✭square ball


    Cheers lads. Manual. showing up a few fault codes. 4521 manifold pressure sensor, 4507 exhaust gas recirculation and 4530 charge air pressure control.


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    #6
    Wheelnut
    Registered Users Posts: 977 ✭✭✭Wheelnut


    square ball wrote: »
    Cheers lads. Manual. showing up a few fault codes. 4521 manifold pressure sensor, 4507 exhaust gas recirculation and 4530 charge air pressure control.

    Could be turbo over-boost alright!


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    #7
    square ball
    Registered Users Posts: 392 ✭✭square ball


    How would you fix it?


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