Over the last few days it's been cold and rainy. My 91 300E has struggled to start first thing during the day over the past few days, would run rough for about 30 seconds, and then would idle fine. However, this morning, it would not start. Typically it is one crank and an almost start, turn it off, crank it again and good to go. This morning it just cranked and didn't even attempt to turn over. After letting it sit for an hour at a time, I went out and tried again to no avail. I could tell the battery was draining. I decided to take out the plugs and clean them, inspect for gasoline wetness (which some of them had) and sprayed some starter fluid into the plug holes. I let it sit for an hour, reinstalled plugs and it fired right up. Anyone have any idea why? I drove to the auto parts store and got some 108 Octane booster and also filled halfway with 91 octane. I've changed out water temp sensor, ignition coil, plugs, rotor, and distributor cap. could it be my idle valve getting stuck in the morning? Does the moisture in the air have anything to do with it?