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"94 3.5L, hard start when hot

2750 6
Starts fine when cold and if started soon after shutdown. If the engine hot soaks for awhile it takes much crancking to start and runs rough for a few seconds. Getting excellent fuel mileage.

AutoXray shows no fault codes.

I suspect the fuel regulator needs replacing. I sometimes smell gasoline after shutting the engine off.

Any Ideas on finding fault?
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