2002 no power can't get any speed

[fixmyself]

2002 no power can't get any speed
My 2002 exp was running good, then two days ago would not start. Got it running again and ran fine, then the next day lost all HP, could not get above 30 mph. I changed the fuel filter know the engine is making noise? The plugs were canged back in January. Any one have this problem could it be some bad coils?

[lectra]

Is your engine still purring or does it sound more like a Harley? Did your check engine light come on? What kind of noise is it making? More info, please.

[timd]

Check for a collapsed muffler (internally)

[Davescort97]

Your catalytic converter could be plugged or if it has come apart it could be blocking the muffler. Check with a vacuum gauge on the plenum. 17 inches or less you have a plugged exhaust system, either the converter or the muffler.