2003 Ford Focus misfiring code PO300

2003 FORD FOCUS
96,000 MILES • 4 CYL • FWD • AUTOMATIC
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MLE
  • MEMBER
  • 1 POST
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 4:54 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Could be caused by vacuum leak or bad fuel.
Jun 3, 2010 at 7:16 PM
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