The battery will lose it's charged after the van has sat unused...which it has almost since I bought this 'hunk of junk' in Feb. of 2005...but with the original problem that I am complaining about is that when the engine warms up and I'm driving down the road, the engine just up and quits...in the beginning, it would start up right away, and now, it doesn't leave the driveway because it is so unreliable. My niece's husband who is a mechanic told us it sounded like the 'heat sensor', but we don't know where that is, so if anyone can help us with this, it would be greatly appreciated. We have replaced many things on this vehicle already and don't want to spend anymore money than I REALLY have to. Thank you.