1996 E36 325tds - revs on its own!!

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  1. 1996 E36 325tds - revs on its own!! 
    #1
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    hi all, im having some serious trouble with my 3 series tds! i was driving home from work on friday and the bloody thing started to accelerate on its own! let off the throttle and it just hit the ren line and stayed there! switched it off and back on again and it was ok untill i touched the throttle pedal again. iv changed the potetiometer thats connected to the pedal but its still the same! any ideas?? maybe the fuel pump?? i know the pump is fly by wire and wondered if its an electrical fault??
     
     

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    May be the pump, have a look here for some info on them 1994 E34 525tds- Idle speed adjustment

    You may come up trumps PM'ing doug1234 as he knows these engines well http://www.bimmerforums.co.uk/forum/members/8620.html
     
     

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    Mine did the same kind of thing, but only revved upto 2000... there was a plug undone on the right hand side of the engine, quite awkward to get to but once it was back on it did the trick... maybe that part needs replacing? (not sure if it was idle control valve...)

     
     

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    #4
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    thanks for the reply, iv resigned myself to the fact that im going to have to book it in to the local diesal specialist and see what they say! out comes the wallet!
     
     

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    spoke to the garage today and they have done a diagnostic, it is the pump! govenor they said, so fingers crossed it can be repaired! mite as well have the bugger chipped while they have it!
     
     

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    does any body know if the fuel pump is coded to the ecu?
     
     

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    #7
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    Quote Originally Posted by jimm love View Post
    does any body know if the fuel pump is coded to the ecu?
    Yes it is, which is why I replaced my engine instead.

    The cost of the pump and labour way exceeded what I could get a replacement engine for and as I did my M3 conversion I knew that it was the easier route.

    Diesel injection seems to be very specialist and there is minimal/no information around regarding DIY repair
     
     

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    bugger!! my local garage have the car and i have to say they are very clued up on such things! should i try and get the ecu from the doner car do u think??? why oh why cant car makers keep things simple!!!
     
     

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    We had a BMW diesel that wouldn't start after a engine change and we then put his original pump on the vehicle and it started, we were told the pump was coded, but looking at the BMW WDS info for a early e39 M51 engine I can only see starter immobilisation? So I'm a bit stumped currently.

    To be sure give a diesel specialist who rebuilds pumps a ring and post back the answer. I can tell you that nothing we did would get the BMW started until we changed the pump.(Pump was fine on the donor car)
     
     

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    god what i nitemare!!! ive got people saying that the pumps are and peeps saying they are not coded??
     
     

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