Our 1978 VW Beetle seems to run fine at home but when we take it to the coast it stalls and dies.?

It is so frustration to be driving and have the car stall and die right in the middle of the road. We have owned the car for 30 years and have taken good car of it. We are having trouble finding anyone who will work on it or knows anything about the fuel injection so any ideas or suggestions will be appreciated.
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