Everytime the car is running the engine doesn't sound smooth and rpms fluctuate from 800-900. This also applies when the headlights are on, which has a little dimming effect, not really sure how to describe it but it's like turning the adjustment **** up and down a little to make the gauges brighter. It has been doing this for about four months or more. Sometimes after a drive and the car is idling on park the brake and battery light rarely flashes on and off with that same effect as the lights. Could it be the spark plugs, not really sure it has been replaced or not? The car has 113,000 miles on it. Also, what are the wiper blade sizes, is it 20" for driver and 21" for passenger, I forgot. Thanks all!

 

Sounds like you need a new alternator,the brake/battery light coming on at the same time is the classic sign of a dead alty on these cars. Be sure you have your old alty tested before buying a new one.

The driver side wiper blades are 21" / Passenger side 20"

 

crap. my wipers are wrong. I think i have 22" on both...