Your ford’s check engine light is on, you’ve pulled the code, and it says p0304 Learn all about the p0304 code, what causes cylinder 4 misfire, and how to diagnose and fix common issues to maintain optimal engine performance. That’s a cylinder 4 misfire — and it can mean anything from a bad spark.
P0304 Cylinder #4 misfire code fix - YouTube
On 3.5l ecoboost engines, carbon buildup on intake valves is a known issue due to direct injection — there’s no fuel washing over the valves to keep.
When the diagnostic trouble code p0304 appears on a ford vehicle, it indicates that a misfire has been detected in cylinder 4 of the engine
This means that the cylinder is not firing properly,. The following steps can be used as a basic template when attempting to successfully diagnose and repair the root cause of a vehicle’s p0304 diagnostic trouble code. The p0304 code indicates a misfire in cylinder 4 Read on to learn its symptoms, possible causes, as well as how to diagnose and fix the underlying issue.
