Before you change the fan clutch see first if it's working.

There's a thermoswitch (red with 3 prongs) on the front driver side of the engine head. Take of the plug and jumper the sockets in any order you like. One is power, aux fan and clutch fan. If they work then just change the switch.

For the stalling, if you have a digital meter, first take a DC volt reading on sock 2 and 3 of the diagnostic port ( covered by a round screw on cap behind the driver side headlight ).

Do this and I'm sure a lot of guys can help you from there.