E60 523i bad idle when warm

[satumashirt611]

Bought a 06 523i auto with this fault.its fine cold but when hot the idle is low and up and down.touch accelerator and perfect.no misfire.it does have faint whistle noise from engine when its doing the bad idle.booked to get codes read next week but curious.any thoughts.its got 195000 kilometers on it

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[Big H]

Did you check the air inlet rubbers for cracks ?

[satumashirt611]

Did you check the air inlet rubbers for cracks ?

Haven't had time yet but will in few hours.

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[dergside]

I had something similar on n53 engined 530i a few months back and it turned out to be the CCV. As per other suggestion, start with the simple in terms of intake air leaks in bellows, etc.

[satumashirt611]

I had something similar on n53 engined 530i a few months back and it turned out to be the CCV. As per other suggestion, start with the simple in terms of intake air leaks in bellows, etc.

Thanks.I'll look


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