2007 Sienna Cylinder Misfires

Asked by Feb 24, 2017 at 12:47 PM about the 2007 Toyota Sienna XLE

Question type: Maintenance & Repair

I have experienced repeated cylinder misfires. It happen after driving at highway speeds after about an hour or two. I pull over and shut the engine off for about 5 minutes start it up and it runs smooth. Once back on the road it will do it again (raqndomly) and I have to pull over again. Have recently (2 months ago) replaced all spark plugs and injector coils...still getting random cylinder misfires but only when traveling at highway speeds. Latest codes were for cylinders 2 & 4.
2007 Toyota Sienna 231,000 miles.

1 Answer

79,305

Check the compression on those two cylinders, they are side by side. If it is low then there is a problem in though's cylinders. Could be something like a rocker out of adjustment or a head gasket.

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