I have a '03 Subaru Forester. When I come to a stop the car occaisionally hesitates as if it is about to stall; it has stalled on occaision but usually doesn’t. Also, when I step on the gas after braking (a light or turn) the car also hesitates as if the gas is not feeding properly.Subaru service cleaned some carbon but problem persists. Please help and thanks.


It appears this problem only ocurrs when the brakes are used. Have you checked the brake fluid level in the master cylinder?

If the master cylinder has failed where it’s allowing brake fluid to enter the brake vacuum booster, this brake fluid can enter the engine via the booster check valve and vacuum line. This can cause the engine to run erratically because you’re introducing substance into the engine that shouldn’t be there.