Hi , .......I'm From Indonesia .....
I have W124 ,1991 300E sportline with M103 engine ......
I mess up final problem with Fuel Enrichment ....., still not solved until now ...
I just replace Airflow Potenciometer with a new one .....
FPR, EHA , Jetronic seem ok .....
Upper Chamber Pressure set at 5,5 bar ; -
lower at 5,1 at working temp , 5,0 at cold
---------------------------------
Airflow Potenciometer :
Voltage measured at idle : Pin 1,2,3 = 0 Volt , 0,9 Volt , 4,1 Volt ...... seems ok
When Accelerator was pressed , voltage raised gradually & Smooth from 0,9 up to approx 3 volt
------------------------
when accelerator released , deceleration shut off was working .....
Lower chamber Pressure Raised to 5,5 Bar , and back to 5,1 Bar after 1300 Rpm ......... seems ok
-----------------------
When Acceleration Enrichment tested :
TD signal was ok at pin 25 Jetronic ..... ( 6 -> 12 volt )
I've already put a resistor 2,5 Kohm to simulate engine cold ........
Idle Switch tested ok , Throttle switch tested ok .....
-------- Problem :
Lower Chamber Pressure never reduced until Throtlle pressed full to bottom ( Full Enrichment Function) .....
At full throttle open , Suddenly Lower Chamber reduced to 3,8 Bar .....
But the lower chamber pressure never reduced ( smooth Gradually ) before full throttle opened ....as the 'text book said' ....
Is There any problem with my 'New' airflow potenciometer ?
How To test That Part ?
sorry for My very2 ugly language ......
I have W124 ,1991 300E sportline with M103 engine ......
I mess up final problem with Fuel Enrichment ....., still not solved until now ...
I just replace Airflow Potenciometer with a new one .....
FPR, EHA , Jetronic seem ok .....
Upper Chamber Pressure set at 5,5 bar ; -
lower at 5,1 at working temp , 5,0 at cold
---------------------------------
Airflow Potenciometer :
Voltage measured at idle : Pin 1,2,3 = 0 Volt , 0,9 Volt , 4,1 Volt ...... seems ok
When Accelerator was pressed , voltage raised gradually & Smooth from 0,9 up to approx 3 volt
------------------------
when accelerator released , deceleration shut off was working .....
Lower chamber Pressure Raised to 5,5 Bar , and back to 5,1 Bar after 1300 Rpm ......... seems ok
-----------------------
When Acceleration Enrichment tested :
TD signal was ok at pin 25 Jetronic ..... ( 6 -> 12 volt )
I've already put a resistor 2,5 Kohm to simulate engine cold ........
Idle Switch tested ok , Throttle switch tested ok .....
-------- Problem :
Lower Chamber Pressure never reduced until Throtlle pressed full to bottom ( Full Enrichment Function) .....
At full throttle open , Suddenly Lower Chamber reduced to 3,8 Bar .....
But the lower chamber pressure never reduced ( smooth Gradually ) before full throttle opened ....as the 'text book said' ....
Is There any problem with my 'New' airflow potenciometer ?
How To test That Part ?
sorry for My very2 ugly language ......
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