misfire

I've come here as a last resort. Heartbroken over months of trial and error. Recently had the engine replaced, and had put in an Autotech HPFP. She has an HPS CAI and a HKS BOV... I know, it's horrible for the engine, but it came with it when I bought it, and I spent all my resources in...

My 2007 Mazdaspeed3 has been running very rich. You can drive it but I avoid to right now as it will stall at idle sometimes. My AFRs at Idle will be in the 9-12 range most of the time. Cruising is alright, except when you let off the throttle, fuel continues to enter the engine creating pops...

1. Alright guys, I need help and am at a loss of what to do. If you want to get straight to the issue that I'm seeing, go to paragraph 3. Let me preface this with a little bit of info about me and the car and then I'll go into what the issue is and what I've tried. 2. I had a 2012 mazdaspeed3...

So I recently decided to spice up my life and buy a 2007 MS3, but I have a problem. I'm experiencing misfires at idle, and it will throw a code for random misfires and cylinder specific misfires after a driving cycle.(I also believe I have a vacuum leak) The Car will pull all-the-way till...

Cel misfire in cylinder 3. I pulled the new plugs found some oil on them then ran a compression test. 180/90/0/180. The first test for Cylinder 2 was 120 then I retested and it dropped to 90. Cylinder 3s tests started with 0 and stayed at 0. I noticed oil in the plug holes as well.