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About whunter
Expertise
Mercedes Benz diesel 1960 - 1985. Rolls-Royce or Bentley 1959 - 1978. Jaguar 1960 - 1989. MG 1959 - 1985. British 1923 - 1969. Micro and mini cars, an area of interest and study, I will try to answer questions on these. Domestic car/light truck 1903 - 1975

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You are here:  Experts > Shopping > Cars > Mercedes > 1991 190E 2.6 rich mixture condition

Mercedes - 1991 190E 2.6 rich mixture condition


Expert: whunter - 10/8/2006

Question

Is there a way to adjust the fuel mixture or could it be in the Mass Airflow Sensor?  Would the airflow unit need to be replaced if no adjustment? What else could lead to this condition?  Any other suggestions are welcome!  Thanx again for all your help.. Russell

Answer
Answer:
Please read this article.

Mercedes-Benz Driveability
Evaluating Electronic Engine Controls
by Steve Brotherton, Import Specialist
http://www.mercedesshop.com/Wikka/EngineControls


There are other possible issues

* Cold Start Valve leaking.
* E.H.A. Valve leaking.
* Fuel Injectors leaking.
* Bad Fuel Pressure Regulator.
* Bad Oxygen Sensor.
* Failed Water Temp. Sensor.
* Weak/failing Ignition Coil.

Lambda tower anti tamper top
http://www.mercedesshop.com/shopforum/showthread.php?p=807884

M103 EHA/Lambda...Advanced question
http://www.mercedesshop.com/shopforum/showthread.php?p=541092

co mixture for 190E 2.6
http://www.mercedesshop.com/shopforum/showthread.php?p=349809


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.6
Part: Cold Start Valve
C4000-25386 Cold Start Valve Bosch IN STOCK $211.13  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.6
Part: E.H.A. Valve
 Note:  Bosch 3.437.010.040
Mounted on fuel distributor.     
C2030-19800 E.H.A. Valve Bosch IN STOCK $272.40  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.6
Part: Fuel Injector
C1000-13519 Fuel Injector Bosch IN STOCK $45.07  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.6
Part: Fuel Pressure Regulator
C3000-44427 Fuel Pressure Regulator Bosch IN STOCK $444.92  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES

Vehicle 1991 Mercedes Benz 190E 2.6
Part: Oxygen Sensor
 Note:  0.258.003.144
 Year: 1990-
C5010-33494 Oxygen Sensor Bosch IN STOCK $142.67  
 
C5010-126054 Oxygen Sensor Universal Bosch IN STOCK $104.72  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

  Vehicle: 1991 Mercedes Benz 190E 2.6
Part: Water Temp. Sensor
Select one of the products from below  
-----------------------------------------------
   Water Temp. Sensor
"K-Jetronic" green
Federal
2 female sleeved terminals with o-ring seals. Located on left side of cylinder head. Temperature sensor for the electronic ignition system with electronic timing control, and CIS-E injection system.    Year: 1987-
Engine: -10-014906
--------------------------------------------
   Water Temp. Sensor
"K-Jetronic" green
Federal
2 female sleeved terminals with o-ring seals. Located on left side of cylinder head. Temperature sensor for the electronic ignition system with electronic timing control, and CIS-E injection system.    Year: 1987-
Engine: -12-033963
----------------------------------------------
   Water Temp. Sensor
"K-Jetronic" green
California
2 female sleeved terminals with o-ring seals. Located on left side of cylinder head. Temperature sensor for the electronic ignition system with electronic timing control, and CIS-E injection system.    Engine: -10-005708
--------------------------------------
   Water Temp. Sensor
"K-Jetronic" green
California
2 female sleeved terminals with o-ring seals. Located on left side of cylinder head. Temperature sensor for the electronic ignition system with electronic timing control, and CIS-E injection system.    Engine: -12-008050
--------------------------------------
   Water Temp. Sensor
CIS Injection
4 pin teminals : color code black : located in intake manifold    Engine: 10-005709-
-----------------------------------------
   Water Temp. Sensor
CIS Injection
4 pin teminals : color code black : located in intake manifold  

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.6
Part: Ignition Coil
F3000-34902 Ignition Coil Bosch IN STOCK $93.92  
  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

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