VCDS and OBD diagnostic device in the On-Board Diagnostics Shop
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ulf
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2023 MG ZS
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Post05-09-2004, 15:12    Subject: Quote

Calvin wrote:
I tested what it consumes in 6th gear, from 1700 to 22 U/min. It was 14.8 liters, and no more would go in.
It's irritating me again because this is a value that I think is normal, as it always appears when accelerating on the highway, and it settles at 13.7 liters with full throttle.

Ah... and the unusually high values during acceleration could also be due to the fact that you are now driving longer distances in the lower gears with a lot of throttle, more than usual.
The usual maximum instantaneous power consumption on the highway suggests that the mass airflow sensor (MAF) is providing sufficiently high values at least around 2000 rpm.
Therefore, the performance should not be reduced by a faulty mass airflow sensor (MAF sensor) at least up to this engine speed range.

Alternative approach: the fuel page, as Jörg also suspected.
-> Filter im Wechselintervall? Vorförderpumpe intakt? Etc. etc.

Quote:
Should I be able to reach Vmax even with a potentially defective MAF sensor?
I'm going to test that now when I drive to the airport.
Faulty mass airflow sensors often quickly limit the maximum speed.
If that target is no longer achievable, it could be due to other reasons as well...
Gruß Ulf
_________

MG4 Electric


Translated on 05-09-2026, 2:04.
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Post05-09-2004, 16:27    Subject: Quote

My favorite pit stop mechanic just told me that I need to come in for a pit stop in 3000 km. I'll probably get everything done at once and tell them to check the fuel filter.
I'm going to drive onto the highway now and test the fuel efficiency there.
>> After driving at full speed for 50 km on the highway yesterday, I noticed that the fuel consumption and speed were the same as usual for this type of driving.
Around 2700 RPM, it consumes 13.6 liters per 100km without showing any signs of strain, and accelerates to 220 km/h at 3900 RPM (according to the speedometer).

Ah... and the unusually high values during acceleration could, possibly, also be due to the fact that you are now driving longer distances with a lot of throttle in the lower gears than usual.

Okay, I've been driving mostly in the city (12 km to work) for the past 3 months. Before that, it was always 35 km (country roads/highway). It's clear that the increased city driving has increased fuel consumption, from 5.3 to 6.3 liters. Additionally, the car has naturally been driven less overall. However, for the past 2 weeks, I've been getting a fuel consumption of around 7 liters, and I've been experiencing the usual problems with getting the car started. Also, the values displayed in the MFA (Multi-Function Display) have been extremely high.
She is currently counting down my service time in increments of 100. icon_lol.gif
Now, as I read the articles about the Longlive oil service, I'm hoping that it will help restore the familiar 'bite' or responsiveness.
Or maybe I should consider moving my car icon_arrow.gif 400 km for a vacation.
During the inspection, I will also specify that the filter, booster pump, and LLM (likely referring to a specific piece of equipment) should be tested.

Please provide the German text you would like me to translate into English. I will then provide the translation and, if you wish, I can describe how the translation process unfolded.


Translated on 05-09-2026, 2:08.
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