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  1. Knock sensor

    Engine / Drivetrain
    Hey, I changed the clutch on my 2007 Mazda 3. All went great until 5 min in when the engine light came on. A quick check of the codes and it showed a bad knock sensor. So, changed the sensor, (me once dealer 2 times) changed wiring me once dealer once and then dealer hard wired to the mcu...
  2. Spark knock on slight acceleration

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    2014, std.engine with 54,000 miles. I thought maybe it was a partially clogged fuel injector, so ran a big bottle of Techron fuel injector cleaner. Tank with Techron is almost used up and, if anything, knock is worse. Next trip will be to dealer. What should I expect?
  3. Knock Sensor CEL Error code P0328. Help needed!

    2004-2009 Mazda3 Discussion
    Hello! Recently my ’04 2.0L Mazda3 went up against some serious flooding and the knock sensor was damaged/shorted-out via CEL/error code P0328. I have been researching parts online but am a bit confused. I see there is the knock sensor itself as well as a "connector". Can someone tell me what...
  4. Is this engine knock? Something else? [Video]

    2014-2018 Mazda 3 Skyactiv Discussion
    Driving home today i noticed a noise in the last 10 minutes or so of the drive - sounded like a slowish and like 'tik-uh tik-uh' sounding ticking noise and it got a bit louder when i accelerated away from a stoplight gently - once up to normal speed it seemed to quiet back down but it was still...
  5. Engine Knock But its not the Rod Bearings

    2004-2009 Mazda3 Discussion
    So my 2006 Mazda 3 Hatch 2.3 has been sitting for the last few months due to what I thought was rod knock at low rpm's. I finally pulled the oil pan to investigate and sure enough #4 rod bearing was barely there, #1 was coming apart from the inside. I replaced all the bearings and put...
  6. Triangle knock out

    2014-2018 Mazda 3 Skyactiv Appearance & Interior
    Hey guys, first post here. We just got my 16 yr old son a 2016 mazda 3 sport (wanted to get him the preferred package, but couldnt, long story ha). He loves the car and this is his first week of driving it. For the 2016 there are so many awesome features. I like it so much I think my next...
  7. super loud knock going from 1st to 2nd

    2010-13 Mazdaspeed 3 Engine and Performance
    This might be a noob question but its just me trying to make sure i didnt break my car lol So last night i was pulling out of a shopping center and decided to get on it full throttle. I shifted from 1st to 2nd and as soon as i let the clutch out and stepped on the gas again i heard a HUGE LOUD...
  8. Cobb AP Datalog - Knock Retard

    2007-2009 Mazdaspeed 3 Performance & Mods
    Didnt know where else I should post. So here goes. 2007 ms3 Stage 1 Cobb AP tune with cpesri. My AFR's are fine as with everything else except my knock retard. Please advise, or direct me into a location where an advisor can assist. I am used to subaru tunes with cobb and Subaru's rarely...
  9. Knock and hpfp dipping.

    2010-13 Mazdaspeed 3 Engine and Performance
    Hey guys, I have a serious problem I need to get it fixed, I don't want to be a case of zzb on the side of the road. I have attached 2 logs, #23 is cold and #24 is warm log. I've noticed more Knock (KR) lately and when it does knock, my hpfp dips down below 600psi for a split second and then...
  10. Knock retard

    2010-13 Mazdaspeed 3 Engine and Performance
    So on my way to Vegas I had my AP set to knock retard and was noticing percentages of 1.0 - 3.3 knock... This was mostly cruising and when I went WOT was when the 3.0 would come up... I have no idea what knock retard is... All I know is it is bad... Am I doomed for zzb? Should I go back to...
  11. Knock retard?!?

    2010-13 Mazdaspeed 3 Engine and Performance
    I did search and couldn't find anything. I wanted to get a little more clear cut picture as far as knock goes. What are we looking at as far as a safe level of knock. I know 0 is best. A friend of mine who is running a downpipe, and exhaust, intake, and an AP with stage one I believe just saw...
  12. Please help!!!!! Engine knock???

    2010-2013 Mazda 3 Engine and Performance
    I just recently advanced my timing on my 2011 mazda3. I don't know if these sounds are "knock". I don' remember how my car sounded before. Please help!! Btw i have cs sri and cat back w/racepipe. i am also on 89 octane gas.