We own a 1995 Volvo 940 with 86,000 miles. During this summer, on several occasions, the car hasn't started after sitting in the hot sun for the day. The next morning (when it's cooler) the car starts. The engine sounds and we can smell the gas when we try and start it, but our mechanic says he can not fix it unless the problem of not starting happens while it's at the shop. I've tried to have it towed to the garage, but each time the car starts before the mechanic can look at it. He's checked everything out while its running and says its all in working order. Does this sound like an electrical problem? Or (sounds unlikely, but) something related to the heat? Any ideas?