Thread: Tuners Help
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Old 06-24-2013, 09:09 PM   #10
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Join Date: May 2012
Vehicle: 2013 Ford Mustang GT Premium
Location: California
Posts: 358

Originally Posted by Ditty View Post
All four of the O2s are wideband. I had a failed O2 on my DS downstream and it would cough and sputter until I replaced it.

With both upstream and downstream O2's on and NO cats, they are reading the exact same thing, so the ECU thinks that the Cats are bad and tosses the CEL and puts the car into a sort of 'limp mode'. The up and down stream O2's are not supposed to read the same thing, if they did (on an unmodified car) it would mean that the cats have failed.
Mine still rips super hard after it throws the codes lol.... Nothing changes lol. Maybe bugged?.

2013 Mustang GT Premium, Black, GT Track Package, Manual, Glass Roof, 3.73, BBK 3 inch Cat deletes, FlowMaster Outlaw 3 inch Cat-back, Steeda CAI, Steeda Tri-ax Short Throw w/ bracket, BMR LCAs, JLT Oil Separator, 91 Race and Performance BAMA Cam Tunes

*RIP* 1995 SVT Cobra, Rio Red, 342hp;362tq - 76,363 miles.
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