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  #1 (permalink)  
Old Mar 30th, 2014, 10:56 PM
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Smile Cooper D problem when driving

Hi all,
I recently had a problem with my cooper
D 1.6 where it started jumping (hard to describe) suddenly
as I was driving in all gears. NO warning lights on. Very noticeable to passengers in the car too. It got very bad to the point I was afraid to drive it and had
It taken to a local garage who replaced a fuel filter (I thought maybe bad diesel)
and that did seem to remedy the problem, or so I thought!
I took it to BMW who serviced it and reported all was well and no faults. However last night as I was driving on the motorway in 6th it jumped a
couple of times again. I drove in 4th the rest of the way and it was ok
and drove ok today as well.

Does anyone know what this could be from? Also why would no
fault or warning lights be on dash?
Thanks for any advice
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Old Mar 31st, 2014, 08:06 AM
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You mean like the engine like stops for a second, gives a jolt? does it just the once then carries on?
Had a similar thing to that on another make, that was traced to a sticking EGR valve, renewing that cured it in my case.
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Old Mar 31st, 2014, 03:14 PM
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EGR sounds plausible.
Have you replaced the turbo seal?
Even though there were no visible problems with my turbo seal, it's a lot better with the new one.
I had to keep the revs up before and it used to 'jerk' sometimes as well.
Replacing the seal has restored the low down torque and it's much smoother.
It's only 12 and 5 minutes (very easy) work, so it's a cheap option to try before you think about the more difficult and dearer EGR.
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Old Apr 1st, 2014, 12:36 PM
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Thanks for those suggestions I'm due to bring it
back to the BMW garage tomorrow. They said they'll
have to test drive it. I've explained it happens
intermittently so they mightn't experience it at all.
I don't mean the engine cuts off I mean its like a real
rough drive like you're being jolted along
suddenly and then returns to normal.

To me the fan belt sounds funny and engine sounds noisy also
would that be connected?

Last edited by Shell123; Apr 1st, 2014 at 06:28 PM.
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Old Apr 1st, 2014, 02:50 PM
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lets us know what it was mate
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Old Apr 1st, 2014, 06:25 PM
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[quote=Shell123;3938050]Thanks for those suggestions I'm due to bring it
back to the BMW garage tomorrow. They said they'll
have to test drive it. I've explained it happens
intermittently so they mightn't experience it at all.
I don't mean the engine cuts off I mean its like a real
rough drive like you're being jolted along
suddenly and then returns to normal.

To me the fan belt sounds funny and engine sounds noisy also
would that be connected?
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Old Apr 2nd, 2014, 07:29 AM
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What do you mean by "sounds funny"?

[quote=Shell123;3938322]
Quote: Originally Posted by Shell123 (original)
Thanks for those suggestions I'm due to bring it
back to the BMW garage tomorrow. They said they'll
have to test drive it. I've explained it happens
intermittently so they mightn't experience it at all.
I don't mean the engine cuts off I mean its like a real
rough drive like you're being jolted along
suddenly and then returns to normal.

To me the fan belt sounds funny and engine sounds noisy also
would that be connected?

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Old Apr 2nd, 2014, 08:37 AM
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I mean there is an audible ticking sound when
car is running
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Old Apr 2nd, 2014, 11:18 AM
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The car runs rougher and sounds noisier when going through a DPF regeneration cycle.
You don't get any warning lights when that is happening either.
I'm now wondering if that's what your problem was/is.
The dealer may be able to interrogate the ECU and see when cycles have been done, which may coincide with when you felt the problem.
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Old Apr 3rd, 2014, 06:40 AM
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Can you identify where the ticking is coming from? Is it from the drive belt area?

Is the ticking occurring all the time or at random?
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Old Apr 3rd, 2014, 09:17 AM
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Angry

@

Last edited by Shell123; Apr 23rd, 2014 at 01:46 PM.
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Old Apr 4th, 2014, 12:06 PM
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Just to update: Fuel pump is being replaced
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Old Apr 10th, 2014, 06:13 PM
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Problem as of yet unsolved....

Last edited by Shell123; Apr 10th, 2014 at 09:24 PM. Reason: Misspelling
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Old Apr 10th, 2014, 06:34 PM
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I had problem fix this week with mine. The was small hole in breather pipe to fuel all fine now
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Old Apr 10th, 2014, 09:23 PM
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Electrical

Last edited by Shell123; Apr 23rd, 2014 at 01:45 PM.
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