had the overboost issue so swopped solenoids and eventually the turbo on my K74
Turbo went in yesterday but since then i get a massive juddering on partial throttle, if i floor it i get a bit of a hold back and then it accelerates away hard.
The juddering comes in at any rev or gear if i only use partial throttle or hold a speed on partial throttle.
The actuator settings look a bit strange on the new compared to the old but i didnt think that would effect it on partial as in the min screw does not touch the actuator arm at all.
Anyone any ideas? Doing my head in now
Thanks as always
Have you checked down in the tech section for Classics for the How to's,? There is one for VGT turbo setup, also there is one for overboost too. I would link but I'm on my phone lol
Thread locking available here...no fee!
i had a look at a standard set up and mine seems way off. arm itself is parallell to the ends of the screws, both screws seem set at the same level of thread in. probably the min boost needs adjusting?? might explain the kangaroo on low load and pulls like a train on full throttle
If you unplug the brown solenoid, the turbo will not provide any boost, you'll be a bit sluggish, but might help to rule that out as the problem. You need to have a look at the actuator arm when idling and when revving - make sure it's working as it should.
'02 K74 single cab.