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Rough idle - driven mad

Starachell
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Rough idle - driven mad

Post by Starachell » Wed Jun 07, 2023 3:09 pm

enuff_zed wrote: Wed Jun 07, 2023 2:42 pm Grasping at straws, but it sounds like it's something to do with an idle setting.
No expert on the N52, but does it have an idle control valve like the M54.
I don't believe it does because of the vanos system. This is something I'm happy to be corrected on though! It feels like it's an idle issue in the sense that the car is either not regulating the mix properly and choking itself, or it's cutting off because it's getting erroneous information somehow.

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smorris_12
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Rough idle - driven mad

Post by smorris_12 » Wed Jun 07, 2023 3:41 pm

No ICVs on an N52. Valvetronic takes care of all that.

FWIW the temperature sensor in the wheel arch is just for the dashboard display. The DME uses a sensor in the MAF for intake (effectively ambient) temperature. I've just noticed they've been changed so possibly a pin has been dislodged in the connector.

I still say air leak. The PCV system is a notable area for these.
------
Scott

Where are we going and why am I in this handbasket?

2006 Z4 2.5si Silbergrau und rot

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