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I had a newer scion xb that was like that. When you keyed on it reved the fans up, then it pulses them at idle. It wasnt like most cars that does nothing til a temp is passed, then run til the temp is 10-20 degrees cooler and stop. Or run on low for ax and if ac is on and the water temp surprasses a certain temp it goes to high speed.
To further confuse me was the fact that car always smelled like antifreeze leaking.
I guess you could wire up a manual relay kit for an aftermarket fan to your oems, however un plugging yours may result in a DTC.
Regardless, blocking the outside of your grill in my experience results in better mpg, even if you end up using the fans for cooling.
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