What are normal Mass Airflow Sensor (MAF) readings in live data?

[aliking]

Thanks Dave - I will test both MAFs with Star in my 500E tomorrow and if they check out fine I will order up 2x screens

hello there, im sorry for posting here again
can u please tell me what it should read on star live data? mine reads 32, whats the best wat to teat it using star?
thanks in advance

 

[gsxr]

With the engine at normal temp (80-100C) and airbox in place, VERY rough readings should be:

Idle rpm = 20 kg/hr
1000rpm = 30kg
2000rpm = 60kg
3000rpm = 90kg

Readings may vary based on other factors but you should see something reasonably close. A totally dead MAF will usually have a fixed reading which does not change with RPM.

 

[aliking]

thank you gsxr, those are the reading at idle for my 1992 500E
i think it needs to be changed according to what you mentioned above

 

[gsxr]

What is the reading if you hold the RPM's at 2000?

Also try the activation for burnoff control, to clean the hot wire, then check readings again.

And, remember that MAF readings could be off if there is a vacuum leak somewhere in the intake tract.

What are your symptoms?

 

[aliking]

What is the reading if you hold the RPM's at 2000?

Also try the activation for burnoff control, to clean the hot wire, then check readings again.

And, remember that MAF readings could be off if there is a vacuum leak somewhere in the intake tract.

What are your symptoms?

the reading reaches more than 40 at 2000rpm
stmptoms are a strong carbon smell from the exhaust, also high fuel consumption.
those are the stored faults

 

[JC220]

FYI - M119 MAF Cleaning | M119 Engine

I recently acquired 2 more spare m119 MAF’s and was initially disappointed in how the car ran when I tested them in my 500E. I could hear the idle getting uneven and the car was not happy with either sensor. I didn’t throw them away but put them on the shelf and when thinking about it decided...

www.500eboard.co

 

[gsxr]

the reading reaches more than 40 at 2000rpm
stmptoms are a strong carbon smell from the exhaust, also high fuel consumption.
those are the stored faults

Hmmm. That is strange. Another data point, hold RPM's at 3000 and the reading should be around 100kg/hr. Again, this assumes the engine is hot and air cleaner/tubes are all in place.

The other 2 codes are likely not related, but indicate you have other problems...

 

[aliking]

Hmmm. That is strange. Another data point, hold RPM's at 3000 and the reading should be around 100kg/hr. Again, this assumes the engine is hot and air cleaner/tubes are all in place.

The other 2 codes are likely not related, but indicate you have other problems...

thank you mr gsxr
can u please explain to me what is the activation of burnoff control?
the other 2 codes indicates a problem in the ETA, bcoz im using a w140 E-GAS unit instead of the original w124 E-GAS unit

 

[JC220]

thank you mr gsxr
can u please explain to me what is the activation of burnoff control?
the other 2 codes indicates a problem in the ETA, bcoz im using a w140 E-GAS unit instead of the original w124 E-GAS unit

FYI - M119 MAF Cleaning | M119 Engine

I recently acquired 2 more spare m119 MAF’s and was initially disappointed in how the car ran when I tested them in my 500E. I could hear the idle getting uneven and the car was not happy with either sensor. I didn’t throw them away but put them on the shelf and when thinking about it decided...

www.500eboard.co

Read this post PLZ. The information you seek is right there

 

[gsxr]

can u please explain to me what is the activation of burnoff control?

In HHT-Win you can manually trigger the hot wire self-cleaning. It will warn you to only do this one time. Details of how it works are in post #2 of Joe's thread linked above.

the other 2 codes indicates a problem in the ETA, bcoz im using a w140 E-GAS unit instead of the original w124 E-GAS unit

Using a W140 E-GAS module in a W124 (assuming both have ASR) should not cause error codes. Something else is wrong.

 

[aliking]

FYI - M119 MAF Cleaning | M119 Engine

I recently acquired 2 more spare m119 MAF’s and was initially disappointed in how the car ran when I tested them in my 500E. I could hear the idle getting uneven and the car was not happy with either sensor. I didn’t throw them away but put them on the shelf and when thinking about it decided...

www.500eboard.co

Read this post PLZ. The information you seek is right there

thank you so much i will try it soon

 

[aliking]

In HHT-Win you can manually trigger the hot wire self-cleaning. It will warn you to only do this one time. Details of how it works are in post #2 of Joe's thread linked above.



Using a W140 E-GAS module in a W124 (assuming both have ASR) should not cause error codes. Something else is wrong.

thank you again, ur help is really appreciated.
i only know that using the w140 E-GAS module instead of the w124 one will disable the cruise control (tempomat).
i installed a new w210 catalytic converters today in my car to reduce the carbon smell from the exhaust and will see if anything changes.