Sign in to follow this  
Gingerbreadlady

Diagnostics code PO304

Recommended Posts

Hi

My 55 plate fiesta started playing up and the engine management. So i had someone do a diagnostic test and code PO304 came up. 

Does anyone have any ideas what it could be. Thank you in advance. 

Share this post


Link to post
Share on other sites

We have changed the injector, plugs and coil pack and it's still misfiring and that code keeps coming up

Share this post


Link to post
Share on other sites

You might have no or little compression in that cylinder. A compression test would need to be done to check for this.

Share this post


Link to post
Share on other sites

Have you changed the ht lead on cylinder 4. It is the one on the right standing and looking at the front of the engine.

If your spark plug gap is 1.3mm you could reduce it to 1.0mm, this will put less stress on the coil pack and it might run better.

Does it run ok sometimes?

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this