Question about 1999 GMC Yukon
After motor warms it misses and has no power already replaced fuel filter,distubator cap,rotor button,and plug wires and no help
You need to test the catalytic converter, these were a common problem. You can do this by removing the oxygen sensor in front of the cat and driving it. It will be noisy, but the open hole will allow excessive back pressure to escape and it will drive better if the exhaust is restricted.
Posted on May 07, 2010
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Posted on Jan 02, 2017
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