IS350 fuel trim problem-Update
06-24-14, 03:46 PM
#1
IS350 fuel trim problem-Update
Hey guys,
Just wanted to update you regarding really high positive fuel trims (running lean). It turns out I had a crack in the exhaust pipe right after the post cat 02 sensor. There is a heat shield there that causes the pipe to rust and crack. I had my exhaust shop weld the crack shut and I checked the fuel trims. They're returning to normal now! Hope this helps anybody who has a strange fuel trim problem. The rear 02 sensor can command up to 10% additional fuel trim!
Just wanted to update you regarding really high positive fuel trims (running lean). It turns out I had a crack in the exhaust pipe right after the post cat 02 sensor. There is a heat shield there that causes the pipe to rust and crack. I had my exhaust shop weld the crack shut and I checked the fuel trims. They're returning to normal now! Hope this helps anybody who has a strange fuel trim problem. The rear 02 sensor can command up to 10% additional fuel trim!
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Nad1370
RX - 1st Gen (1999-2003)
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04-28-10 04:38 PM