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Muffler delete equals Rich condition

Sounds like bad O2 sensor dude. Just went through this with my headers. My one plug was slightly cracked so the wires werent making a complete connection on the one

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Old 08-13-2012, 11:10 AM   #17 (permalink)
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Sounds like bad O2 sensor dude. Just went through this with my headers. My one plug was slightly cracked so the wires werent making a complete connection on the one sensor. I was getting 10-12 city and 15-17 highway....pulled the plug and now I'm at 18 city and 28 highway. Plug for you is easy to replace anyone 2011 and up will be a bitch. They use different plugs and the dealerships can't even order them...having one specially made :/
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