Please bear with me as I try to describe my predicament with my 1991 Volvo 240. I purchased my brick in January of 2011. Ran like a champ and I never had any issues until that summer. I'm driving 70 mph on the highway in July in Oklahoma City (it was HOT out), and without warning she decelerates. I push the gas pedal to the floor without any result. I'm on the side of the road, I kill the motor. Turn the key, she reluctantly starts up, but she's not getting fuel and the car won't move. I shut her off and wait. 15 minutes later I turn the key. The car immediately starts, and goes as if nothing ever happened. I drove to a gas station thinking that maybe I had put bad gas in it, so I fill up and throw a bottle of additive in for good measure. Everything's great until I have the exact scenario a month later (i.e. 90+ degrees, highway driving, etc.); she quits, we wait, we go. I do some research, and replace the fuel pump relay and all seems well until August and we go through the same song and dance. In the same month I moved from Oklahoma to northern Michigan (trailered the crotchety 'ole b*****) and once in MI, decide to do some poking around. I check the inline fuel pump- looks new but one of the ring terminals is barely hanging on, so I replaced it and for 2 years the car ran great UNTIL last week when I drove it downstate when it was 88 degrees out. I made it almost 200 miles before experiencing this issue (mid-day), and it happened twice on the way to my destination (total trip oneway was 250 miles), but I drove all the way back in the evening and it was fine. I've spent a ton of time researching this problem and I don't really know where to start. I change my oil and can fix little things but I'm no mechanic, (I'm just a girl :-)) and it's hard to diagnose when obviously whatever part is causing this isn't actually broken! It just malfunctions when it reaches a certain temperature? Hopefully there is someone out there who knows what in the hell is going on so I don't have to reinvent the wheel. Thanks for your time.