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Old 09-12-2020, 08:41 PM   #1
Scooby Specialist
Member#: 196910
Join Date: Dec 2008
Location: L.I. NY
2011 WRX

Default GR WRX Fuel Stumble

My 2011 WRX is experiencing a stumble at around 2700-3000 RPM. Everything that Iíve researched it seems this is only an issue that pertains to Stiís of this generation. Typical fix is fuel regulator/rails, but again it only references Stiís and not wrx. Has anyone run into the same issue with their GR wrx and were able to fix it?

Car has an IAG block, ID1000 injectors, AEM fuel pump, TGV and air pump delete.
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Old 09-12-2020, 08:50 PM   #2
Scooby Newbie
Member#: 516780
Join Date: Jul 2020
Location: Georgetown Kentucky
2008 Subaru wrx sti


The easiest fix to try is hook the fpr vacuum reference under the throttle body instead at the driver side intake manifold.. Doesnt work for everyone but some.. Also what ive read is the 1000cc injectors have a little more issues than other sizes.. Good luck with this annoying issue
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