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Hey guys, I'm hoping to get some clarity on the sensors in the water bypass block on my 88 4Runner 3.0 AT. I think I have most identified, but I'm unsure of what the red arrow is. Possibly a coolant temp switch that activates overdrive? Any help or adjustments to what I have labeled is greatly appreciated. I found the water bypass was mostly clogged, which could explain why my OD is intermittent and why I have a hard start and low idle at times. I also can't pass smog so I'm rebuilding the fuel injectors as they are likely contributing to high HC. Lots of stuff going on.
Update: I think I got it all correct with lots of digging. Hopefully this helps someone out there down the road.
Thank you.
Spoiler
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Last edited by PaigeGriffin; Mar 31, 2025 at 03:53 AM.
Mar 23, 2025 | 08:43 AM
