Junior Member
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Join Date: Jul 2022
Location: Oceanside, CA
Posts: 4
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Junior Member
Join Date: Jul 2022
Location: Oceanside, CA
Posts: 4
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my son, what seems to be a similar if not exact problem in his 1999 4runner 3.4L. Problem was it was never throwing any codes. Finally, after trying to fix the problem a few different ways, one being replacing the throttle position sensor, which didn't work...the car finally threw a code. Forgive me, I don't remember the code but it indicated a potential problem with the air/fuel sensor. Replaced that, fixed the problem and hasn't occurred since.
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