po304 code

2006 CHEVROLET CAPRICE
147,176 MILES • 2.8L • 4 CYL • RWD • MANUAL
Avatar
TREVER NELSON
  • MEMBER
  • 3 POSTS
I have replaced all spark plugs and coils checked the wiring and everything runs smooth but the code still appears.
Jun 16, 2017 at 12:28 PM
Advertisement
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
That is a misfire cylinder number four check injector is okay, check compression and check for a vacuum leak at that cylinder, start here.
Jun 16, 2017 at 8:20 PM
Avatar
TREVER NELSON
  • MEMBER
  • 3 POSTS
Where do the injectors sit?
Jun 17, 2017 at 2:03 AM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,051 POSTS
I can get you a diagram but can you check the year and model please? I don't show a 2006 Caprice.

Cheers, Ken
Jun 19, 2017 at 4:28 AM
Avatar
TREVER NELSON
  • MEMBER
  • 3 POSTS
2006 chevy colorado rear wheel drive 2.8 liter 4 cylinder
Jun 19, 2017 at 6:49 AM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,051 POSTS
Please start a new question

https://www.2carpros.com/questions/new

Cheers, Ken
Jun 21, 2017 at 10:26 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.