RBNarvasa Posted January 24, 2019 Share Posted January 24, 2019 My 2011 Impreza has acceleration hesitation issues if RPM is below 2K. Once it reaches 2K, problem goes away but comes back again when it upshifts and RPM falls below 2K. I've tried cleaning the MAF sensor and relearn throttle position but problem still persists. Any suggestion what to do next? Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted January 24, 2019 Share Posted January 24, 2019 scan for trouble codes . if knock sensors go bad they can cause loss of power without always throwing a check engine light. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted January 24, 2019 Share Posted January 24, 2019 (edited) Lack of power on early FB's is very likely to be broken valve springs. There is a recall. Take it to the dealer to be checked out. .....if it has an FB. Forester did in 11, but I might be a year off on the Imp. GD Edited January 24, 2019 by GeneralDisorder Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted January 24, 2019 Share Posted January 24, 2019 yikes Quote Link to comment Share on other sites More sharing options...
RBNarvasa Posted January 25, 2019 Author Share Posted January 25, 2019 "The recall for the valve spring issues, involves vehicles manufactured from January 16, 2012 to May 14, 2013. The affected models are 2013 Model Year (MY) BRZ, 2013-2014MY Legacy/Outback, 2012-2014MY Forester and 2012-2014MY Impreza/XV equipped with the FA20 engine or FB20 engine." Mine is a 2011. Will have it checked tomorrow.. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted January 25, 2019 Share Posted January 25, 2019 Hhhhmm yeah I don't understand why the 11 Forester isn't listed because that absolutely is an FB25. But maybe it was a supplier thing only affecting 12 to 14. GD Quote Link to comment Share on other sites More sharing options...
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