i have a 92 prelude si that has issues starting in cold weather. it turns over fine, but it seems like the gas isn't getting through. i have taken it in multiple times to get it checked out and nothing obvious seems to be a problem. the battery is brand new, as is the fuel filter. the fuel pump has been checked out and nothing is wrong with it. once it starts, on the rare occasion, it runs fine the rest of the day after the engine warms up. my mechanic seems to think that i had a bad tank of gas at one point and some water has frozen somewhere, but i've filled up a couple times since that and it worked ok until recently with a full tank. any help?