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This Website is the ultimate resource for Advanced DIY Auto Repair with the specific purpose of preventing “parts changing”- that is- changing parts on a guess because of a lack of understanding on how to test if a part is actually faulty. This is accomplished by using a methodical, scientific approach to accurately confirm a diagnosis before attempting a repair. Subscribe here and you’ll stop firing the “parts cannon” by changing O2 sensors, plugs, and wires to try and fix your check engine light and instead use professional-level advanced Auto diagnostics and repair with tools and equipment available to any home mechanic.