Question about 2004 Saab 9-3
The check engine light can come on for many different reasons. There is only ONE reason for it to flash or "blinking" because excess or un-burned fuel is going into the exhaust and WILL damage the catalitic converter. The weak power and engine shaking is because not all cylinders in the engine are working. Most common causes are tune-up related. If you have a spark plug that does not work ( creates a spark to ignite the fuel which makes the engine run) this unburned fuel will go into the exhaust where the catalitic converter is located.This unburned fuel will cause excessively high temperatures in the converter and Will damage it. The most common reasons for no spark at the plugs- worn or defective spark plugs, spark plug wires or ignition coil. Hope this helps
Posted on Nov 26, 2013
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Posted on Jan 02, 2017
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