2001 Toyota Sienna Q&A
2001 Toyota Sienna Question: My van's front catalytic converter heats up and misfires after 30 minutes.
My front catalytic converter turns red hot and cylinders 2, 4, & 6 begin to misfire. The engine code reads misfire in the three cylinders. There is very little exhaust when the vehicle begins acting up. I have removed the front catalytic converter but the three cylinders continue to misfire (no where near as bad as it was before cat removal) and the engine codes still reads misfire in cylinders 2, 4, & 6. The spark plugs have been replaced. Any suggestions? - elcheeko
Sounds like excessive fuel is being burned in the cat. Possible injector/pressure regulator problem. Black smoke from exhaust? - pushrod
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