Quote:
Originally Posted by mikehallbackhoe
I removed my alternator belt on my crx, and the cold idle went from 2000 rpm , to 2500 rpm. I had to ride the brakes going through town! I put the belt back on. I just bought a 31A yellow top optima battery for my dumptruck, which doesn't get a lot of use. I am going to put the optima in my crx when the weather gets nice, and remove the alternator belt. It won't cost me anything to experiment. the extra power is nice, even without the mpg gains.
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your idle changed because the computer was reading voltage, reading alternator, and the alternator was saying it wanted to charge like crazy.
so the computer raised the idle with iAC to compensate, but the alternator never got to charge.
So, when done, you hurt your battery by running it down, and you got worse gas mileage because your idle was higher and never came down.