stalling Dodge Caravab 1999

I am having problems with my 1999 Dodge Caravan. After driving for awhile the car either completley dies or while I'm pushing on the gas the speedometer goes to 0. I have changed the oil and looked at the fuses. There was one shorted out and IOD Memory? Does anybody have any ideas. Mechanics are all over the board on what they think is wrong from fuel filter to vapor locking. Any help?
Thanks
Dale

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Does it sputter and stall - kind of a loss in power, or just die out like somebody turned the key off, flicked a switch, or "pulled the plug" - so to speak?
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