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F20 / F21 1 Series (2012 - Current)
The second generation of the BMW 1 Series range of hatchback cars. Not available in the USA the F20/F21 was released in 2011 as the successor to the E81/E87. The body styles of the F20/F21 range are a 3-door hatchback (F21) and 5-door hatchback (F20).

The coupe and convertible models were spun off to create the BMW 2 Series.

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Old 02-17-2020, 01:33 PM
Vezzel Vezzel is offline
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Location: Denmark
 
Join Date: Jun 2009
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Mein Auto: E61 530d LCI
F20 116d running real bad when EGR is active

Hi.

I have an 116d from 2013 which running real bad when EGR is active. Its like running on 2-3 cylinders.
When accelerating the engine runs fine. The engine starts perfect.
No error stored in the ECU.
The engine has sometimes some engine-knocking worst from idle to about 1200rpm.
Removing the connector to AirMass sensor or to the EGR-valve the engine, which will disable the EGR-system the engine running fine.
EGR-valve replaces, Air-Mass-sensor replaced, EGR-temperature sensor is replaced. The injectors is tested OK by Bosch.

The EGR-temperature after EGR-cooler shows 40,96 Degrees Celcius always...? (Using ISTA)
The Airmass-values is fluctating a lot at idle - The values is fluctating from 9 to 21.... Even sometimes it 'peaks' down to 0...? (Using Delphi-tester)

Do you have any ideas how to solve this problem?

Before this problem the high-pressure-pump was replaced because the shaft-seal was pushed out of the pump, which sent at lot of diesel into the engine-sump.
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