The saga continues. Volve v70 T5 turbo - 160k.

A week ago, low oil (2.5qts), thought it was bad turbo or VVT solenoid. Car sat for a 3 days, started up and ran smooth. 5 days later, symptoms back. Wife drove car, once warm and after driving for an hour. Same issue back, rough idle, and stalls at stop sign.

Second symptom, on when she accelerates hard, there's a fan like noise that revs with the engine.

Any and all help greatly appreciated.

Time to pull a couple of spark plugs to see if you are running rich. If the plugs are dirty with gasoline, start looking for a cracked vacuum line around the intake manifold.

The 'fan' noise could be a failed forward engine mount, that is the one under the timing belt. A failed mount could let the crank wheel touch the sub frame under hard accelleration.

Found a good sized crack on one of the rubber hoses connected to the turbo. Will replace and see if that solves it. Also the MAS was a mess. Going to clean that as well.