I-15 OUTSIDE ST. GEORGE, UTAH. OUTSIDE TEMP 110. 4:30 P.M. DRIVING SINCE 11 A.M. DRIVEN 275 MILES ON A FULL TANK OF MID GRADE GAS WITH OVER 1/4 TANK LEFT. ENGINE SHUT DOWN AND WOULD NOT RESTART. TRIED AGAIN SEVERAL TIMES OVER THE NEXT TWO HOURS. ENGINE WOULD CRANK BUT NOT FIRE. TOWED INTO STEPHEN WADE JEEP DEALERSHIP AND LEFT OVERNIGHT. VEHICLE STARTED THE NEXT MORNING. REPAIR SHOP COULD FIND NO PROBLEM. HAVE DRIVEN 600 MORE MILES SINCE THEN WITH NO PROBLEM. THERE WAS NO CRASH BECAUSE WE WERE FORTUNATE TO GET OFF THE ROAD WITHOUT INCIDENT ALTHOUGH TRAFFIC WAS VERY HEAVY. *JS