2003 X5 3.0 Occasional misfire/rough running - Bimmerfest - BMW Forums

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Old 10-10-2012, 06:07 PM
rugsta rugsta is offline
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Location: Australia
Join Date: Oct 2012
Posts: 2
Mein Auto: X5 3.0 2003
2003 X5 3.0 Occasional misfire/rough running


We have a early (pre-facelift) 2003 X5 3.0 automatic. Firstly its an awesome thing, I'm more a fan of small hatches and sports cars and never thought a big hoofing 4x4 would be my thing. That said its agility, interior, and cruise waftability has won me over during the year we have had it and while I'd prefer a manual gearbox and better mpg its still the best car I've ever owned.

It does however suffer from occasional rough running. It was pretty bad (basically it ran of 5 cylinders and threw errors all over the place) but I had the coils and plugs replaced cleaned the idle control value and replaced a broken DISA valve. Since all this was done its improved a lot but it still has the occasional cough and splutter.

Only when hot never cold.
Less likely if driven gently (no med-hard acceleration)
If you switch it off and on again 99% it'll run fine again
In Drive at standstill you can hear the 'fluffing' and it 'pulls'.

It has a leaking cam cover that I'll be replacing but thats a by-thought. I'm thinking a new PCV and associated plumbing is my next shot but before undertaking this painful experience (yeah I've done my homework!) just thought I'd throw it out there to the community.

Any ideas/experiences with similar problems would be appreciated


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