I can to auto analysers since they were recommended by the DMV. I spent over 5,000 dollars having a new engine put in my car by another repair shop. My car got rejected three times on emissions test since the computer and sensors weren't functioning right. I was ready to get rid of this car until the DMV convinced my to go to auto analyzers. These guys found the problem and got my computer and check engine light to work leading to discovering a bad O2 sensor. I passed emissions and am grateful.
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