You could check the coolant temperature sensor. Yours should be a 4 pin I believe. You do a 2x on them. 1&3 & 2&4. +20C 2.28-2.72koms, +80C 290-364Koms. If it's out of range it could cause you trouble when cold there. It's a quick easy check with a vom. You could also check the intake air sensor 2&3 for a reading. Both up front on the 2.3.