1. I have no computer on my 1984 car. 2. I only drove it less than 2 miles, which didn't hurt the battery, I checked with a meter when I was done, and 3. the gas I used in my 2 mile test run won't hurt my average mpg very much. I now have an optima battery designed to run without an alternator, and be recharged without hurting it, and I lowered my idle speed to compensate for the lighter load on the engine. there are advantages to driving 28 year old technology (:
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