What causes your Honda accord to stall when parked in direct sunlight?

Some of the ignition coils get fussy when they are too hot. I don't know if that's the case for your car but I've seen it a couple times.

CHECK YOUR FUEL PUMP RELAY...THEY GET HOT AND DON'T WORK PROPERLY.

ALSO OPEN THE GAS TANK CAP.....LET THE GAS FUMES GET OUT (FUEL PRESURE

ON YOUR GAS TANK) GOOD LUCK.