W124 250TD OM602 Superturbodiesel build
W124 250TD OM602 Superturbodiesel build
I installed a new turbo, a Holset HE431V. To make it work, I installed the pressure actuator that it normally has oppositely (as it was controlled by the ECU of the truck that it came off and the turbo was normally open, and with pressure fed to the actuator gradually closed), so the actuator keeps the turbo quite closed, and when boost comes, it opens it up. But recently under load, when the turbo should start to make boost, it just stalls, it feels like engine brake, and I get smoke out of the exhaust. If I step off the accelerator, after a few seconds the turbo starts spinning again. Until now I tried:
-Changing the fuel filter and cleaning the tank filter
-Changing the initial position of the vains in the turbo
-locking the actuator in one place as I tought that the pressure inside the turbo might force it to open up before the boost would indirectly open it,
all of them with no luck. Also, I dont feel that the 7,5mm pump that I built would deliver as much fuel as those elements could, but that is another story. First I want to fix the turbo as it drives me crazy that the car is slower than stock sometimes when the turbo stalls.
Has anyone have experience with the Holset VGTs and pressure actuators for it who knows what could be wrong?
Thanks.
mmetzdavid
07-30-2019, 08:41 AM #28So I have a problem again. Maybe someone can help me fix it.
I installed a new turbo, a Holset HE431V. To make it work, I installed the pressure actuator that it normally has oppositely (as it was controlled by the ECU of the truck that it came off and the turbo was normally open, and with pressure fed to the actuator gradually closed), so the actuator keeps the turbo quite closed, and when boost comes, it opens it up. But recently under load, when the turbo should start to make boost, it just stalls, it feels like engine brake, and I get smoke out of the exhaust. If I step off the accelerator, after a few seconds the turbo starts spinning again. Until now I tried:
-Changing the fuel filter and cleaning the tank filter
-Changing the initial position of the vains in the turbo
-locking the actuator in one place as I tought that the pressure inside the turbo might force it to open up before the boost would indirectly open it,
all of them with no luck. Also, I dont feel that the 7,5mm pump that I built would deliver as much fuel as those elements could, but that is another story. First I want to fix the turbo as it drives me crazy that the car is slower than stock sometimes when the turbo stalls.
Has anyone have experience with the Holset VGTs and pressure actuators for it who knows what could be wrong?
Thanks.
1 Guest(s)
1 Guest(s)