2001 Mazda Protege Check Engine Light

2001 MAZDA PROTEGE
10,700 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
SANDYBEACH
  • MEMBER
  • 1 POST
What does code po304 mean? Said Cylinder 4 misfire. What needs to be done to correct.
Oct 1, 2010 at 11:10 AM
Advertisement
Avatar
MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
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 11:12 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.