Wren mw54 eco r Fadec pump not working.
 

Turbine lovers!

I have a old kj66 with Wren mw54 eco r fadec unit.
Manual gas start ecu all by hand unit number MA-397
I would love to get the old machine back to running i put a 4cell battery everything starting up except the fuel pump.
The pump is only making al little buzz but is not turning.

What i already tried:
-different battery's connected.
-measured pump voltage from ecu unit its 5v
-put the pump directly on 3v its running good
-changend parameters in the ecu unit but the pump is still only buzzing

Does somebody had this same problem? i think its something in the driver circuit of the pump in the ecu unit.

Maybe somebody have the manual of this ecu?

Here is the 6.0 ECU manual, it might get you at least pointed in he right direction. You need to check the voltage on the pump while connected to the ECU. If the voltage stays really low, you might have a drive issue. The ecu does have a starting voltage for the pump, if that is not set correctly, the pump will never get enough voltage to start running.