Quote:
Originally Posted by Techno Duck
When the car feels like its operating in overboost, is it immediately while boosting the car, or will the car boost correctly then revert to overboost? Does the car feel sluggish even at part throttle or only WOT? Does this happen only when trying to hit full boost or also at partial boost (say 5-9psi).
Do you have access to the Turbo factory manual? Look at pages 28-30 though 28-35, specifically test point 12 for the knock / pressure control.
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When I got the car it had a broken cycling valve so I had all boost, all the time. That caused the KLR to do the severe cutout after only 10 seconds or so of boost. This time, max boost never happens, and after 15 seconds or so it pulls it back to 1.2 (on the gauge.) If I'm on the freeway for a while I can get more boost again for the same amount of time--it does reset.
the car's not 100% happy off boost, either, but it's not much worse than it was. I do occasionally have a 2000+rpm idle, too...I think it's time to pull the intake and change more stuff.