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Old 03-29-2022, 07:00 PM #16
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If you are ever overheating you turn the heat on full blast not the ac.
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Old 03-29-2022, 11:55 PM #17
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Yes the front o2 sensor maybe giving you grief. Fluid levels staying normal is a very good sign. No white smoke on startup very good sign. Just keep an eye on the fluids for a little while if they stay good. I highly doubt you have warped or damaged heads.

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7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread: https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
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Old 03-30-2022, 06:01 AM #18
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Quote:
Originally Posted by gamefreakgc View Post
The Oxygen sensor is one of two primary inputs for fuel and air. Having one that isn't working probably is like having a clogged jet on your carburetor, it's just not gonna run right until it's fixed. DENSO oxygen sensor for a 2002 is going to be pricey as it's an actual air/fuel ratio sensor which runs around $150.00. Without that part working correctly your fuel mileage is really going to start to tank and you'll notice it'll start to drink gas by the gallon. You'll end up paying $150 one way or the other, either for the part or the extra gas.

Do not use anything other than a OEM DENSO sensor. Doesn't have to be from Toyota but it does have to be a DENSO.

Great advice thank you. Answered all of the questions i didn't think to ask
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