Having problems with your 2008 Ford Mustang GT ?

08 Mustang GT Codes PO420 & PO430 PO171 & PO174, w/off road x-pipe no cats.

\015 I'll clear the codes, but the next time I stomp on it the codes pop up? Ihave no cats w/muffler delete, so straight pipes all the way back. Has cold air intake w/plenum spacer. Also running SCT Tune, had to run Octane Boost, could this have messed up sensor? Even though bottle says will not harm O2 sensors? And at almost redline in 3rd gear car will start to hesitate like not getting enough fuel? I know whole bunch of stuff!\015 Posted / edited by AnonymousUser on : 18-03-2019

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Repair Help & Product Troubleshooting for 2008 Ford Mustang GT

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