p0304

Okay, I have done a lot of research and posted on multiple forums but I am stuck. Preface: 2007 Stock Mazdaspeed3 with short ram intake. Bought at 108,000 miles from the original owner, currently has 120,000 on the clock. The Head gasket blew and burnt a valve at 112,000 miles. Replaced the...

Hey guys - just created an account on here, but I was a member on the mazdaspeedforums for quite some time. I'm trying to see if anyone would have any advice on how to best approach the P0204 injector circuit malfunction and P0304 misfire. The two CELs only come up during cold starts...