2003 Ford Focus misfiring code PO300

2003 FORD FOCUS
96,000 MILES • 4 CYL • FWD • AUTOMATIC
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MLE
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My 2003 ford focus has been idiling high and now it is missfiring really bad it is bring up the code Po300 what do u think the problem could be?
Jun 3, 2010 at 11:54 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
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Could be caused by vacuum leak or bad fuel.
Jun 4, 2010 at 2:16 AM
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