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Originally Posted by 2000izusu
if it was running that rich (to plug the cats) you might want to check your o2 sensors. don't want the cycle to start over again. mike  |
2000izusu has a good thought here. Thinking along with him, I would also test the engine coolant temperature sensor (Toyota calls it an ECT sensor) and replace the thermostat. If either of these 2 items are out of spec, they can cause the engine to run richer and eventually ruin the cat.
Good luck with the new engine.
Mike