jmodge
Top Post Dawg
- Joined
- Jun 18, 2015
- TDI
- More than I need, less than I want
Vane levers wear into the ring. If there’s significant play at that point you most likely will never get it to act correctly.
Thete are some turbos that use shorter actuators at the threads and even some with a shorter adjuster heim. Maybe you ended up with one of those?As I was adjusting it this time I was reminded that the rod isn't long enough. Even when the adjuster is just off the threads of the rod there is still a little bit of play in the vane lever. I'm sure I bought some random diaphragm for the lowest price and it just doesn't fit well.
I've had the rod and lever apart a few times and it always feels like the lever moves freely. I think I need to actually set set the down position via vacuum. This time I didn't, but last time I did. I'll do that this week and report back. When I first got everything back together after the IP, injectors, and head refresh with the tune it didn't seem like it was going into limp mode. Then it did once, and then all of the time. Now, post "adjustment" it only does it on the highway.But without seeing what you’re dealing with it’s just a guessing game.
Have you disconnected the rod from the vane actuating lever? The lever should cycle with zero resistance. Somehow the vanes are partially closed if you’re getting boost when the ecu isn’t calling for any, such as when in limp mode
Could be. I didn't know there were long/short combos. It would make sense that this engine would be the oddball, since it's from an early 99 mk4.Thete are some turbos that use shorter actuators at the threads and even some with a shorter adjuster heim. Maybe you ended up with one of those?
I can't get the rod end off of the actuator arm with the diaphragm installed. When I "fixed" it this last time I just went by memory of where it was installed. I need to verify that the actuator is hitting the stop at 18"Hg. I doubt it, honestly.If the rod is set to max length and you’re still getting boost try this. Pull the vacuum line so the diaphragm is at rest. Remove the snap ring to see if the vanes are fully open and the diaphragm is not restricting movement. This I’m asking assuming that with vacuum applied the lever hits the stop screw.
Has the cartridge ever been removed? It seems to me I had installed a vane ring flipped on the wrong side once and it limited range.
Can you measure the extended threaded rod (no vacuum) and the heim adjuster? I'll compare to what i have here.Checked the rod adjustment with MityVac and gauge today. The rod is 100% too short. I checked that the vane actuator arm moves 100% freely from hard stop to hard stop.
When I apply 18 inHg to the diaphragm the threaded rod doesn't reach the adjuster portion even when the lever arm is on the stop.
I think what I did last time was just put minimal threads into the adjuster to get it as close as I could. Now I obviously need to do something about it, since it's causing issues.
I finally got out there to take a look at this. With the vacuum actuator off, from the bracket to the tip of the threads is 1-7/8".Can you measure the extended threaded rod (no vacuum) and the heim adjuster? I'll compare to what i have here.