2001 Mazda Protege Check Engine Light

2001 MAZDA PROTEGE
10,700 MILES • 4 CYL • FWD • AUTOMATIC
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SANDYBEACH
  • MEMBER
  • 1 POST
What does code po304 mean? Said Cylinder 4 misfire. What needs to be done to correct.
Oct 1, 2010 at 6:10 PM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
When was your last tune up? Bad plugs or wires is the main culprit, if they are good, test the injector, and compression check the engine.
Oct 1, 2010 at 6:12 PM
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