xKailx
Member
I've heard that some vw have diverter valves. Does the 98 Mk3 tdi have a diverter or is it just waste gate on the turbo? Thanks. Still searching but if someone knows that would be very helpful.
What function makes the WG open at 8 psi? The spring inside the WG actuator? What pressure makes the WG open at 8ps? Boost pressure? Exhaust pressure on the WG itself?the wastegate is set to open at ~8 PSI.
Intake pressure is used through the N75 to hold the wastegate closed.
Here's two things I know for a fact. From the car we're working on right now.To control boost, the ECU uses the N75 valve to block boost from reaching the wastegate
The AHU / 1Z use a "conventional" wategate, spring pressure holds the wastegate closed. Preload on the spring sets the PSI the wastegate will open at. When 8 PSI of intake pressure air acts on the actuator, the wastegate starts to open.What function makes the WG open at 8 psi? The spring inside the WG actuator? What pressure makes the WG open at 8ps? Boost pressure? Exhaust pressure on the WG itself?
Yup. That's why limp mode cuts so much fuel. Without the fuel "power", there's not enough exhaust energy to overboost the turbo. Same idea on my SDL.So it seems to me if hose to waste gate was plugged the vehicle should over boost. Would this be consistent with your understanding?
I understand and learned something new with warp field collapse, but certainly I would see this overboost on vagcom before fuel cut comes in? (question)So any overboost condition on these gets the fueling cut by the ECU.