Massey Ferguson E 94 (16) – Engine ECU (EEM3 or EEM4): Fuel filter pressure ABOVE NORMAL

The Engine Control Module (EEM3) has detected that the fuel filter pressure is higher than the normal operating range. This condition indicates a restriction or blockage in the fuel system downstream of the fuel filter, which impedes fuel flow to the engine and negatively impacts performance.

• 8600 Series (8650
• 8660
• 8670
• 8680
• 8690)
• 7600 Series
• 8400 Series
• 7400 Series
• 6400 Series
• 5400 Series
• 9695 combine
• 9795 combine

1. 1

   Inspect fuel condition for thick or gelled fuel, which is the most common cause during severe cold weather snaps.

2. 2

   Inspect the primary and secondary fuel filters/water separators for heavy dirt, debris, or water contamination causing a restriction.

3. 3

   Test the fuel filter pressure sensor and its harness for damaged wiring, open circuits, or a faulty sensor sending an erratic high pressure voltage signal to the EEM.

1. 1

   Relieve System Pressure

   Shut down the engine and safely relieve the fuel system pressure. Have a drain pan ready to catch spillage.

2. 2

   Treat Cold Fuel

   If operating in freezing temperatures and fuel gelling is suspected, treat the fuel tank with a winter anti-gel additive (such as Power Service Diesel 911) to break down the thickened fuel.

3. 3

   Replace Fuel Filters

   Remove the old fuel filters and water separators. Install new OEM-spec filters to eliminate the restriction.

4. 4

   Prime the System

   Properly prime the fuel system to ensure all air pockets are removed before they can reach the injection pump.

5. 5

   Clear Codes and Test

   Start the tractor and monitor the EEM. If the E 94 (16) code returns and the engine still falls into a derate/limp mode under load, replace the fuel filter pressure sensor.