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  1. #1 Re: Car getting horrible MPG 
    Donating Users Liquifire's Avatar
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    yes, the front o2 sensor would be the one that needs to be replaced, as the rear o2 is to see if the catalytic converter is working properly
    98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM
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  2. #2 Re: Car getting horrible MPG 
    Donating Users 16MustangVet's Avatar
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    Or you could take the exhaust loose like I did and it ran just fine then all the codes make me think its more than an 02 sensor people are so quick to blame them and I still dont think they fail as people think. All these symptons were happening on my GP just take the exhaust loose and see. If it was the same fault over and over then yeah prolly an 02 but all these problems I doubt it.
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