This all started after i ran a bottle of gunk 5 minute engine flush. Webthe code p0304, boiled down to its essential meaning, is a warning that your ford vehicle had a misfire in cylinder 4. The problem lies in what caused the misfire, how to locate it,.

Understanding the Context

Web — the p0304 code means that cylinder #4 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the. Originally posted by fordfairlane. Ok, did the dreaded spark plug change and after a few hundred miles of smooth driving she started to misfire.

Key Insights

Web — is it coil on plug? If it is the spring in the coil sometimes doesnt make contact and a miss acures. There might also be a short in the plug or the procelin may be. Web — the p0304 code means that cylinder #4 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the.

Final Thoughts

Received 0 likes on 0 posts. Hi all, wednesday evening on the way. Web — last wednesday got p0304, so i changed the ignition coil on the #4 cylinder. I changed 1, 3, 6 already and no issues. But today the p0304 code came on when i. Web — a bad ignition coil or spark plug is the most common cause of a p0304 code, and that is also where you should start the diagnosis.

What does the p0304 code. Web — i have a reg cab 4. 6l f150 coding p0171 (bank 1 too lean) and p0304 (misfire on cylinder 4). You may have 2 problems, but probably not the fuel pump.