I need some real help. My wife has a 96 Windstar 3.8 that just up and died on Saturday. It sputters and back-fires through the intake, and then dies. I have changed the plugs and wires. Cleaned the MAF and some other thing in air tube. I need this stupid thing fixed. Any advice would help. Oh yeah the plugs I took out are covered in soot, and smell like gas.