Trouble Code P0304 on 350Z

Reply Subscribe

Thread Tools

Search this Thread

Aug 9, 2012 | 09:18 AM

Elcidious

Thread Starter

New Member

Joined: Aug 2012

Posts: 2

Likes: 0

From: Thousand Oaks, Ca.

Trouble Code P0304 on 350Z

I have a 2003 350z that I bought 2 months ago and I have placed a new Injen CAI on it. After installing it I have had a trouble code come up P0304 and I have cleared it only to have it come back after 200-300 miles. I have replaced the spark plugs, moved all the coils to different cylenders (to see if that was a bad coli and code came back the same) added fuel injector cleaner also.

Could it be a vacuum leak?

Thanks in advance...

Aug 9, 2012 | 09:41 AM

Neimad

New Member

Joined: Dec 2003

Posts: 573

Likes: 5

From: Oakland

Check the PCV breather hose but that's closer to cyl 6 so I doubt vacuum leak. Check wiring harness, do compression test.

Aug 9, 2012 | 09:48 AM

Elcidious

Thread Starter

New Member

Joined: Aug 2012

Posts: 2

Likes: 0

From: Thousand Oaks, Ca.

Thanks for the advice.. Ill check the PCV hose tonight along with the wiring harness....

Aug 9, 2012 | 07:19 PM

GGGVenom

Registered User

Joined: Jan 2003

Posts: 31

Likes: 0

From: Cali

P0304 is a generic code for misfire on cylinder 4; did you see oil on top of the plug when you removed it .. possible short in wiring if you have already moved the coils around ..