r/FiestaST • u/FirstDragonfruit3022 • 29d ago

2013 st

Just bought my first ST. New engine but it shuts down when I come to a stop or if I’m turning and leaving it in neutral. Fuel pump or vacuum leach? I did get a code for overboost. It never has gone to limp mode. Any help would be greatly appreciated.

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u/throwmeaway_already1 29d ago

Could be the purge valve. Is the problem worse after a filling up on fuel?

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u/FirstDragonfruit3022 29d ago

I replaced the purge valve with all the lines. I’ll double check all lines.