Knock retard at partial throttle on the freeway

Discussion in 'Mazdaspeed 3 General Discussion' started by Matt Dickey, Apr 6, 2021.

Watchers:
4 users.
  1. Matt Dickey

    Matt Dickey Greenie Member

    Joined:
    Apr 3, 2021
    Posts:
    64
    Trophy Points:
    8
    Location:
    California
    Ratings:
    +8 / -0
    Hey guys forgive me if this has already been covered but i couldn’t find anything but im registering knock consistently on my AP V3 when at very moderate throttle opening during cruising speed on the highway for example i will be cruising at 75 and if i ease on the throttle or ease off the throttle i will register 5.45 on my knock sensor and it will slowly taper off to 0 or if i let off the throttle it will drop immediately same thing with acceleration. Im wondering if this is just ignition retard for fuel economy purposes or something else. I can make a data log if necessary. Nothing is wrong with the car otherwise and when this happens i dont notice anything happening as far as weird noises or vibrations. Any input would be awesome not really concerned because i dont register Knock retard at full throtte or under any other circumstances so im not concerned just curious
     
    Matt Dickey, via an iPhone, Apr 6, 2021
    #1
  2. The_big_dill

    The_big_dill Greenie Member

    Joined:
    Jun 11, 2020
    Posts:
    182
    Trophy Points:
    28
    Location:
    Aurora, ON. Canada
    Ratings:
    +84 / -4
    While I appreciate your concern for the data, this is a known condition for fuel economy purposes. Knock at light load is OK, and at times intentional.
     
    • Like Like x 1
  3. Sho

    Sho Silver Member

    Joined:
    Feb 10, 2016
    Posts:
    1,388
    Trophy Points:
    113
    Location:
    Louisville, KY
    Ratings:
    +2,986 / -0
    FB_IMG_1618532410903.jpg
     
    Sho, via a mobile device, Apr 15, 2021
    #3
    • Like Like x 3
  4. Matt Dickey

    Matt Dickey Greenie Member

    Joined:
    Apr 3, 2021
    Posts:
    64
    Trophy Points:
    8
    Location:
    California
    Ratings:
    +8 / -0
    You guys are awesome thank you and sorry for the late reply
     
    Matt Dickey, via an iPhone, Sep 3, 2021
    #4
Loading...

Share This Page

Users Viewing Thread (Users: 0, Guests: 0)