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mk20vt
Joined: 08/17/2021 Posts: 2 Karma: +1 / -0
Free account, no CAN development support
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18-08-2021, 0:26 Subject: Fuel Injection Amount Idle / Metering Device |
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Hello everyone,
Due to an inaccuracy in my AFN code, I was overly enthusiastic and replaced the lower seal on the quantity control unit. I loosened the three screws, marked everything, and reassembled it. However, I didn't log the actual injection amount at idle before the repair using VCDS. The engine runs smoothly, starts well, and has normal fuel consumption, but I feel like it produces slightly more soot than before. Since I found many different values in searches and forums that range from 3 to 5.5 mg/stroke, I wanted to ask if anyone here knows the exact values for the AFN (warm engine, without any electrical load).
Thank you very much.
Translated on 24-08-2026, 18:43.
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dieselschrauber Administrator


Joined: 04/12/2002 Posts: 18086 Karma: +797 / -0 Location: St.Gallen 2018 Volkswagen T6 
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18-08-2021, 21:58 Subject: Fuel Injection Amount Idle / Metering Device |
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4.75 mg per dose.
Have fun setting it up! X
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Translated on 24-08-2026, 18:45.
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mk20vt
Joined: 08/17/2021 Posts: 2 Karma: +1 / -0
Free account, no CAN development support
dieselschrauber likes this. |
19-08-2021, 22:44 Subject: Fuel Injection Amount Idle / Metering Device |
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Hello.
Thank you for the precise information! I actually adjusted the fuel injection pump based solely on soot emissions and driving behavior to 4.6-4.8 mg/stroke. Before that, it was set at 3.8 mg/stroke, but it produced excessive soot, and anything above 6 mg/stroke results in a poor warm start.
Thank you again for the information; I can just leave the pump as it is then!
Best regards,
Translated on 24-08-2026, 18:46.
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