Help! When the weather is good and the air is dry it works fine when either hot or cold. But when it's raining and the air is damp either in summer or in winter it stalls. Engine starts fine but stalls in two-three seconds. A single way to drive is to push accelerator pedal stronger. After five minutes of driving everything is okay, i can start and stop without a problem. Also it a bit helps at the beginning of driving to turn headlights off. What it could be? A battery and a fuel filter are new. CIS fuel injection system (not a carburetor). Thanks for the help in advance!