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The fuel filter may be clogged.
The lower filter on the fuel pump may be clogged, if so adding gas can help. If you can, check the fuel pressure.
If it smelled rich the ECT could be going bad, in that case it will run when cold.
You could have a massive vacuum leak, check the lines for cracking or other damage. Check the intake resonator assembly on the I4 for disconnected parts. The PCV line on the V6 has a habit of getting soft and collapsing.
The I4 could have a timing belt issue. Otherwise it sounds like a fuel/air mixture problem.
