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ME-SFI post-start enrichment function - GF07.61-P-3011AM

ENGINE 113.990 in MODEL 211, 219 

ENGINE 113.991 in MODEL 215, 220 

ENGINE 113.992 in MODEL 230 up to Model Year 2008 

ENGINE 113.993 in MODEL 463 up to 31.5.12 

ENGINE 113.995 in MODEL 230 up to Model Year 2008 

Fig 1: Identifying ME-SFI Post-Start Enrichment Function Diagram
G07870940Courtesy of MERCEDES-BENZ USA

After a cold start the fuel-air mixture is enriched for a short time to ensure that the engine runs smoothly.

Post-start enrichment compensates for the fuel which has precipitated on the cylinder barrels.

The post-start enrichment is dependent on:

  Fuel injection valve, location/task/design/function   GF07.03-P-5004KE
  Crankshaft position sensor, location/task/design/function   GF07.04-P-4116AM
  Coolant temperature sensor, location/task/design/function   GF07.04-P-5026AM
  ME-SFI control unit, location/task/design/function   GF07.61-P-5000AM