1996 Ford Crown Victoria engine runs rough

1996 FORD CROWN VICTORIA
160,000 MILES • V8 • 2WD • AUTOMATIC
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KWM
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On the way home after a meeting the car suddenly started to run rough while in gear. It runs normally in neutral and park. I changed the spark plugs and wires due to code P0300 with no effect - might be running a little rougher than before I changed the plugs. The first time I had codes checked it was only P0308 but after the plugs were changed the codes were P0301, P0302, and P0308.

I suspect that the problem is either a vacumm hose, coils, or fuel injectors. Any other possibilities?
Feb 22, 2010 at 12:33 PM
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RASMATAZ
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Engine running rough or misfiring can be cause by the following:
1.Defective spark plug.
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
Feb 22, 2010 at 7:52 PM