Question about 1997 Jeep Grand Cherokee

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I have a 99 jeep Cherokee 4.0 2wd and it's running rich, missing, and popping. The SUV runs fine then I loose power get a pop then I get power again check engine light is on and the code says a rear o2 sensor is out, The engine makes the air intake sound like a vacuum cleaner at times what is a solution to correct problem. My jeep has 144k miles, the engine is extremely clean, no leaks, and always maintenance d. please help

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Follow the code, Replace the rear o2 sensor

Posted on Oct 09, 2010

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