Slight problem with my W reg 2000 Forester S Turbo manual / petrol.
Occasionally not always but under acceleration it stutters almost like a misfire.
Changed air filter , fitted K & N Panel filter , tightened up all hose connectors and cleaned electrical connectors.
Car will run fine then out the blue stutter for a minute then clear and run for day or two no problem
Returning good mpg around 28 mpg / starts straight away / no smoke from exhaust / idles fine without rev counter moving and generally does what i ask of it. Not using any oil nor water / just done 300 mile trip ok.
Baffled though by this stutter.
Instinct says fuel starvation but its had a walbro pump fitted just before i got it.
Any suggestions appreciated ?