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I need help sporty has no power on full acceleration but does at partial accel. Runs with no popping until I erased the codes and then it was spitting and sputtering under the hood any body have any ideas i don't want to just throw sensors at it and waste money please help thank you all
 

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2008 SpectraSX, 2014 Optima LX,2006 Jeep Liberty, Linux Mint Mate
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Agreed!
Pull the first O2 sensor and read the amount of back pressure at that bung hole.
If it is over 2~3 PSI at about 2~3000 RPM then you have exhaust restriction probably caused by a plugged Cat.
Dave
 
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