Toyota Rav4: Shakes When Idling → Causes and Diagnosis
Sep 07, 2019 · Your Rav4’s engine creates vacuum when running. This vacuum is carefully controlled. If the vacuum system gets a leak, it will cause a shake when idle. A vacuum leak can be caused by a bad vacuum hose, intake manifold gasket, and other vacuum powered accessories. Diagnosing a vacuum leak can be tricky.
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