+18 1990 Buick Lesabre Rough Idle Check Engine Light Ideas. You don't want to wait to get this checked out! If your service engine soon light is on, you’ll need to pull these trouble codes to see what is wrong with your lesabre.
All codes have cleared but yet the check engine light comes on randomly and it has a rough idle at times, the rpm needle most of the time bounces a little and stays under 1,000rpm. Web a flashing service engine soon light is telling you that something needs immediate attention. We have replaced the idle arm pulley, the harmonic balancer, the starter.
