2002 Chevrolet Trailblazer Q&A
2002 Chevrolet Trailblazer Question: service engine soon light
Check engine light comes on, Trailblazer is sputtering and reduced power. Took it to local car parts store to have the code read. Cylinder 5 not firing. Okay, that explains it, but where to start to fix it? Spark Plugs? Wires? Injectors? Can bad gas cause a cylinder to stop firing? Filled up just before this happened. The Trailblazer is a 2002 with 69,000 miles on it. never had a major issue with the Trailblazer. - JSkriloff
i would replace all the plugs and the coil in number 5. this would be a good start. Roy - mastertech6371
Bad gasoline could clog injectors, you have the main culprits fuel, spark, could be a vacuum leak, engine mechanical issues too many possibilities impossible to guess without being able to do some diagnostic test. A professional grade scan tool allows the mechanic to look at all the sensor values to see what fuel trim figures are, air flow into the engine, oxygen sensor values and a lot more. If you want to try looking at the problem your self look at a workshop manual for trouble shooting charts. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is also a company that independent auto repair shops buy their information from that the same information inexpensively to do it yourselfers. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online - patrick mannion
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