1st question: does the alternator have an effect on average gas mileage?
My car started to have an unusual hum which i've isolated to be coming from the alternator. since that hum started, i noticed my mileage went from and average of 26 mpg down to 20 mpg.
2nd question: The Toyota parts department told me that the 1990 2vz-fe came with 2 different alternators. A 70A and an 80A alternator. My question is, if i install and an 80A alternator into my car, will it have a negative affect on the car?
I'm not sure which alternator my car came with yet.
here's what i know about my alternator: it has a hum which Haynes says could be a bad bushing. What's left of the part number is -62012. based on that number the Toyota parts dept rep told me that's the 80A alternator. but, several web sources say that it's the 70A alternator
The reason i'm asking, is b/c i want to get the alt either from an aftermarket store or directly from Denso cuz it'll be cheaper. Toyota's askin for ~$275-300 >.<