P0304 Diagnosis for 1999 Chevy Silverado with 5.3L Engine: How to Fix Misfire on Cylinder 4

Model: 1999 Chevy Silverado Fault Code: P0304 Posted: 2008-10-09 12:30

I own a 1999 Chevrolet Silverado equipped with a 5.3-liter V8 engine and am currently experiencing the P0304 diagnostic trouble code, indicating a misfire in cylinder #4. I've already replaced the spark plug, coil, and ignition wire, but the code persists. What are the most likely causes and next steps for diagnosing this issue? Any recommendations on checking fuel injector performance or engine compression?