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  1. General Troubleshooting and Technical Help
    Hello all, I've got a '98 Forester (5MT) 2.5 with about 270k on the clock. Recently, here in Wisconsin, we had a pretty cold week where morning temps were around -15F. The car would fire up right away, but I noticed a slight hesitation under partial load around 2000 rpm. The symptom only...
  2. General Troubleshooting and Technical Help
    I have a 2014 Forester Premium xt w 70k miles. For the last two years or so, it's been plagued by intermittent hesitation. Not horrible but something you notice when you watch for it. Particularly bad in mountains, when accelerating hard, and also when the tank gets low. We're afraid at this...
  3. FA20DIT - 2.0L Direct-Injection/Turbo (2014-2018)
    I had the p0420 code come on about a week ago saying Catalytic converter system bank 1 below threshold. I started experiencing some sort of hesitation/studder feeling when driving on the interstate a couple days ago. It only happens when at highway speeds (65-75). I haven’t had the time to take...
  4. Engine Management, Tuning and Datalogging
    Hey everybody. I finally got my car on the road and am in the process of E-tuning. We got it running pretty good and decided to start adding ethanol into the mix, car has flexfuel. At E35 I have an aggressive hesitation in 1st and 2nd gear as boost comes on or once in boost. Tuner thinks it is...
  5. EJ20 - 2.0L Turbocharged
    Short story: 2004 EJ205 Forester 2.0 Turbo will now hardly pull at all below 3500RPM, and I am struggling even to increase the RPM when flooring the throttle. I achieve increased RPM eventually by pumping the throttle. See this video: In the beginning of the video I simply press the gas pedal...
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