Tried to start it runs very ruff wont keep running and backfires
I would suggest you start with the basics. Check your wiring on your spark plugs to ensure they are in the right order. If you can grab an OBD scanner, I'd start with it as well. It can reveal many mysteries. Your running rough usually sounds like a timing issue. If there are over 100,000 miles on the vehicle, the timimg belt will be suspect.
Best of wishes.
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Have the cam shaft syncro checked out. and the crank synsor
After you kill it, when you try to start it back up, does the starter turn the motor? Or is it froze up (will not turn over)?
SOURCE: runs rough/worse, backfire sputters, smell fuel
make sure all wires are secure on the plugs. Make sure that if you bought the plugs aftermarket, that they are the suggested equipment from the Ford (http://www.car-stuff.com/carparts/fordtaurus20002000motorcraftmisp432154315.html Make sure the plugs (gap) were not damaged during installation. Check the firing order is correct. (1,4,2,5,3,6)
SOURCE: replace a serpentine belt on a 97 ford taurus
use a 15mm box wrench on the nut retaining the tensioner pulley to pry the tensioner 'arm' against the spring to release belt. note belt routing on decal under hood,or make a sketch,to aid in replacement.
on OHV engine rotate clockwise
on OHC rotate counter clockwise
be sure belt is completely seated on pulleys
SOURCE: 2000 ford focus w/ 2.0L on cold start-up runs ruff, idles badly until it warms up
Could be a problem with ECT (Engine Coolant Temperature) sensor or fuel injection system. Will need to test and check in order to discard.
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SOURCE: 2.9L bronco 2 will not idle without missing and backfiring was running good done all at once
It sounds like your timing belt jumped a tooth. You'll have to realign your camshaft to crankshaft and change your timing belt. Also, did you recently fill up?
Testimonial: "yes filled up yesterday drove about 100 miles"
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