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Wow, I'm shocked...my coolant was close to a quart low. I filled up the radiator to the cap; no more idle issues. I'm just stunned - I never would have thought that low coolant level would affect engine idle. Thanks a million guys!


Cheap fix huh? Some of your sensors weren't getting a good read on temperature of the engine. Not enough coolant to pass thru or over those sensors I guess.

Now, where did the coolant go?
Keep an eye on the coolant level, and let us know if you need to keep topping off.

85 4Runner - With NEW Marlin 4.7 Gears!! It's a whole new beast!