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Author Topic: '62 BMW F30 330d EML on...  (Read 1218 times)

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Doctor Gollum

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'62 BMW F30 330d EML on...
« on: 05 February 2018, 17:30:34 »

As above, no smoke, no loss of performance and economy pretty consistent at 44-46 mpg over last 65k. Now on 106k, full BMWSH.

Has following two codes:

290900 Air system: air to EGR air mass flow, plausibility measured air mass compared with calculated air mass too high.

24CE00 Hot film air mass meter: ratio of calculated to measured air mass too high.

Apart from EML, car runs fine, plenty of power on demand, no obvious air leaks, idle is rock steady and no hesitation under load.

No live data as code reader cannot access it. No other codes present.

Any thoughts?
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Nick W

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Re: '62 BMW F30 330d EML on...
« Reply #1 on: 05 February 2018, 17:58:27 »

Swirl flaps?
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Doctor Gollum

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Re: '62 BMW F30 330d EML on...
« Reply #2 on: 05 February 2018, 17:59:40 »

Any way to tell without dismantling :-\
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Marks DTM Calib

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Re: '62 BMW F30 330d EML on...
« Reply #3 on: 06 February 2018, 08:15:09 »

Its telling you there is a difference between the quantity of air weighed as going in by the MAF and that which the engine would consume for a given RPM and manifold pressure.

I cant see swirl flaps causing that as they don't result in a differential of that type.

An inlet air leak (split intercooler, split pipe, dirty EGR) would be my first port of call
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Re: '62 BMW F30 330d EML on...
« Reply #4 on: 06 February 2018, 11:07:47 »

Pipes all intact with no obvious air leaks, so will suggest cleaning the EGR as a starting point...

Ta :y
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