My 2003 Outback manual transmission has begun to stall out when slowing with the clutch engaged. Already changed out the fuel injection idle control valve, rather than help, it now does it more often. Still get great gas mileage 29-30 per gallon. Also have a check engine light on, saying the c converter. I have ready many posts indicting the stall happens with A/C on -- not in my case, and not when it is particularly hot or cold. The only way to "regulate" it is to shift really fast and not let the rpm's drop. Any thoughts?