Throttle Position Sensor Problem? Revs cut to tick-over intermittenly when driving. 2001 E46 325ti - Page 2

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Thread: Throttle Position Sensor Problem? Revs cut to tick-over intermittenly when driving. 2001 E46 325ti

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    #11
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    if its exhaust sensor it usually dosent cause tickover issues more booming noises from exhaust and poor power...

    but it needs addressing tho before proceeding...
    330i sport a big chunk of berlin...

     
     

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    #12
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    330i sport a big chunk of berlin...

     
     

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    eclat2008 (12-02-2014)

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    #13
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    HI DD, I don't know if you've misunderstood but there is no real problem with the car at tickover - it is when the pedal is down and accelerating that the revs cut to tickover. It is as if somebody has unplugged the accelerator pedal connector as I'm driving The engine doesn't stall or run rough - it simply cuts the rpm. When it happened last night I pressed in the clutch - gave the pedal a few stabs and then it magically kicked back into life. A couple more questions - do the cam sensors need to be specified for the correct side? The mechanic that fitted one a couple of years ago said they were all the same but I've since seen them listed for exhaust and intake. Have you had any experience with Hella cam sensors?Ive seen one for about £32 on ebay - I am trying to avoid going to BMW to buy a genuine one if it doesn't fix the problem. Thanks for the links above - very concise.
     
     

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    It wasn't the Cam sensor - Replaced that (I reckon a mechanic I used a couple of years ago had put the wrong one in - if that's possible? as the pickup looked different) Cleared the fault and now the code hasn't came back but it's still cutting the revs down to tickover intermittently so it must be the throttle body. Managed to get one off ebay for £15 so going to have a go at it today.
     
     

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    dailydoggy (16-02-2014)

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    i had this on my mates car and it was the the throttle position sensor on the throttle body...cuold be the sensor on the pedal too tho...
    330i sport a big chunk of berlin...

     
     

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    eclat2008 (16-02-2014)

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    Cheers DD - I've replaced the pedal and replaced the throttle body today and the fault appears to have gone - I now I have a different problem:( Took it for a spin out and its really sluggish, its fine once the revs build up, change on the red line and it goes as well as always. Could it be that now I've fitted the new TB that it has an adaption that I need to clear or something? It just feels really really slushy like there's no torque, I then have to knock it down a gear and let the revs build. Getting to the stage now where I'm ready to take it off the road and use something more reliable like my 1970s Lotus
     
     

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    ide get INPA and clear all the adaptons (not with engine running)....
    330i sport a big chunk of berlin...

     
     

  12. Finally Fixed and never work in the dark:) 
    #18
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    Right.......Here comes the embarrassing part As it was getting dark the other day I may have overlooked something - After putting the Throttle body on I forgot to connect something..... Whatever the plug was on the main loom directly opposite the radiator! Not sure what that's for (possibly exhaust cam sensor?) It wasn't until I stripped it all down again by torchlight that I found it. Put that in and took it for a spin, the accelerator pedal was still a bit jumpy but the torque was back.

    Heard a few things about resetting the adaptions without using the PC software. (I'm definitely going to get INPA soon though). First I switched the car off, then put it to setting1 for 10seconds, then switched off for 10seconds and then straight away started the engine. Took it for a spin....still a bit jumpy

    I pulled up again, Switched off, put the key on setting 2 for 10seconds, then switched off for 10seconds and then started the engine....the pedal feels smooth as a baby's bottom (not speaking from experience)

    My mate is going to come round tomorrow with his laptop anyway and clear the adaptions as a matter of course but I think the above works.

    Still got a problem with my MAF (I'm going to clean it again and see what that does first before I replace it) so I unplugged it and gave it another run - the car pulls like a train.

    Cheers for your help DD - I hope this helps someone in the future.
     
     

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    #19
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    Conclusion - if your car experiences problems cutting the revs down to tickover (but not cutting out) intermittently its probably your throttle body.

    Don't worry yourself silly - if you can't afford a new one get a cheap one off ebay (£15-£50) to at least see if it solves your problem.

    Remember to plug everything back in after
     
     

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    dailydoggy (18-02-2014)

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    #20
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    Thanx for the update fella and remember do NOT reset the adaptions with the engine running...
    330i sport a big chunk of berlin...

     
     

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