Had the same problem on the highway in my 2weeks new used Forester. Almost zero throttle response suddenly with the same lights and the thunking that you mention.

Subaru said it was this problem with the turbo and then that problem with the turbo and eventually opted to just swap for a fresh one after about 2 weeks of tinkering.

 

Same kind of issue I experienced.

See this thread to see what the dealer did: http://www.subaruforester.org/vbulletin/f88/09-xt-limited-chokes-43839/

 

Thanks for the input. The dealer ship are still scratching their heads as to what it could be. I'll mention the loose connector thing but they have wired it up to plenty of laptops and things in the passed so I would guess that they would have noticed any problem with the connector

 

update- the subaru garage thinks it is the "turbo solenoid" that has gone so they will replace the whole turbo. let's hope this fixes it!
What is the solenoid anyway? is is some kind of actuator that opens up a wastegate or something?

 

Sounds like the boost control solenoid, a seperate part to the turbo (on the inner wing by the front turret on SF's not sure about SG's), it bleeds air away from the actuator to increase boost over the static actuator setting. Not sure why they would swap teh trbo for that as well, unless its precautionary.

Simon

 

Did you get this sorted?

Max.