Hi Newbie here, i have a MB Sprinter 311 CDI MWB motorhome conversion which is losing power.
It's been to the garage 5 times and they finally have given it back but not fixed as they've given up, they have changed all the turbo sensors/Regulators and actuator but still the same.
When they tested the cables when the ignition is on the turbo sensor is reading the wrong voltage they said, they think it's an issue with the ECU and told me to change it to see if that works.
When driving it's fine for about 5 minutes then seems to go into limp mode, but there are no warning lights on the dash? If i stop and turn it off and start it again it's fine again for another 5 to 10 minutes then goes again.
When it loses power it will not go over 3000rpm, but when fine it reaches over 4000rpm which is correct. Does anyone have any ideas or help to fix this ongoing issue?

 

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