New answers tagged stall
The nature of your problem suggests a vacuum leak and the gas smell suggests an evaporative emissions control (EVAP) leak. Might be worth a check.
Plug an ODB2 reader and check for any fault codes. Might be related to the coils/plugs like Joel said, could also be a fuel trim issue caused by bad O2 sensors. An ODB2 reader would let you check all of this. Could just be the idle valve on the Throttle body. Do you still have the stock TB? Would be worth a try to swap them. If not, make sure it's clean.
Amelio: You can try changing the ignition coil and the spark plugs. I had a similar issue a few days ago, and we found out that the ignition coil had one bad terminal, and the spark plug located in that terminal, was a little wet... Give it a try! I'm a Ford Mustang 2004 v6 3.8L owner from El Salvador..
There is a sidestand switch that kills the motor if you attempt to put it into gear with the sidestand down, it's a safety measure. Check that switch at the top of your sidestand to see if the a mount bolt or nut has fallen out thereby loosening the switch and making the vehicle inoperable when you put it into gear.
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