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Pastimes : Auto Repair & Maintenance Tip
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To: Jon Khymn who wrote (114)11/12/1999 6:10:00 AM
From: rustyjack  Read Replies (2) of 134
 
The water you add to a battery is changed into acid by the charging action of the cars electrical system. Batteries today are supposedly maintenance free, meaning you should not have to add water. If you are having to add a lot of water and you are getting lots of corrosion on the battery terminals (green icky stuff), I suspect the battery has become sulfated and is nearing the end of it's useful life. (Also the need to add water frequently can be a sign of an overcharging condition in the electrical system.) You can clean the posts and then coat them with grease to retard this corrosion or there are sprays and corrosion protectors that can be placed under the cable clamps.
As far as the rough idle, this is a harder question to answer. There can be many reasons for it. Simply adjusting the idle speed higher can be done, but it would probably just be masking the real problem as the idle speed should be controlled by the computer system.
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