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linda_fuchs1
Sequoia engine power loss
4 comment(s)
linda_fuchs1 (Author)
Vacuum leaks, huh? And boost solenoid... Where exactly should I be looking for these things? I'm not super familiar with the intake manifold layout. Any tips?
ludwig_fox4
The vacuum lines are all over the intake manifold, trace them carefully. But honestly, based on your symptoms, especially the fuel consumption, and my own experience, it sounds like a defect in a vacuum switching valve is most likely. I'd suggest getting it checked out at a workshop. It's probably easier than trying to diagnose it yourself.
linda_fuchs1 (Author)
Thanks for the advice! Took it to a shop, and you were spot on - vacuum switching valve. Repair cost me 140€. Runs like new now!
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ludwig_fox4
Sounds familiar. I had similar issues with my Sequoia, though I can't remember the year. Check for vacuum leaks around the intake manifold. A faulty boost solenoid or boost controller can also cause these symptoms and a pressure drop. Have you checked those?