What's wrong with my van? on 2000 Dodge Grand Caravan

The van stalls intermittently at low speeds and stops - such as in parking lots, at stop signs, turning corners, etc. Runs great otherwise. No codes. Have had throttle body, idle air valve, and fuel injection system cleaned (twice), new fuel filter, air filter, oil change, anything we could think of... Have taken it to 3 or 4 places, nobody knows...except the Tire Store, who says it must be the huge crack in my exhaust crossover pipe - $800 to fix - however, the other 3 places I took it could find no such crack... They also told me the spark plugs and wires were not the "right" ones but I don't believe them now. Could it be bad spark plugs/wires?

so many things to guess...first i would check the fuel pressure, check the fuel pump maybe failing and could be the bad spark plugs/wires. good luck
1 more answer
yes, it could be bad spark plugs and/or wires. maybe it could be other things too