Inspecting Spark Plugs for Cracks And Wear
![](/clipart/pageHeaders/inspect.gif)
This is a plug with 75,000 miles on it that is firing normally. No large deposits, not discolored . Reddish or green deposits would indicate burning coolant. Black, sooty deposits would indicate burning oil.
![Inspecting spark plug](/sitebuilder/images/PICT0300-244x173.jpg)
Also check for hairline cracks in the porcelain insulator (1).
![Cracked spark plug will cause misfire code P0300 and an engine that idles rough](/sitebuilder/images/PICT0303-245x173.jpg)
Question: want location of fuel filter on 2002 buick v-6 3800 model
Answer: That depends on what model Buick you are talking
about. It is either on the right or left side of the fuel tank.