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What is it and where is it located ?
A friend of mine had his replaced and his mpg increased .
Maybe his was bad or something but is it a work or not work sensor or do they get weak ??
Thanks
It's pretty much a work or not work sensor. IT on the firewall, just to the right of the heater core hoses. It has a three wire plug, and an 1/8" ruber hose going into it. its gray with a black wire plug.
I dont see how he would loose any milage from it, I have never unhooked mine, so I dont know, I think he just got lucky and had a good tank of fuel after that.