Rebuilt CCC Qjet Tuning

Discussion in 'Engine Topic' started by MP81, Oct 8, 2019.

  1. MP81

    MP81 Veteran Member

    Messages:
    307
    Likes Received:
    9
    Joined:
    Oct 10, 2016
    Location:
    Washington Township, MI
    How did you know the coolant sensor had gone bad? Was the car throwing a code?

    So, if I short the two pins on the diagnostic connector to read any codes, I can hear them rapid-firing from under the hood. If I just key on, they're not going. Not sure if they're supposed to be moving when I'm just in key-on, or only when the car is running (when you'd not really be able to hear them anyway).

    Distributor is original, so that should be good. O2 is old, but I have a new engine-side pigtail so I can go ahead and get a true extension harness and install the new O2 I have for the car.
     
  2. ale81

    ale81 New Member

    Messages:
    7
    Likes Received:
    3
    Joined:
    Jun 8, 2019
    Location:
    Katy, TX
    Actually, my temp sensor had not gone bad but given the state of the wiring and that this is my daily driver, I wanted to know that it would be reliable so I did the replacement.

    I don’t think the MCS is supposed to fire with just the key on (except when shorting the diagnostic connector). Mine doesn't and I think I recall a post by member Damon that some cars did but not the Camaros. I don't know if mine is louder than normal but you can definitely hear it clicking with the engine running. Maybe try unplugging and plugging yours back in while it's running? There should be some sound difference. Or maybe stick a test light on it to see if you get a strobe effect.
     
    Last edited: Nov 11, 2019
  3. MP81

    MP81 Veteran Member

    Messages:
    307
    Likes Received:
    9
    Joined:
    Oct 10, 2016
    Location:
    Washington Township, MI
    I'll have to put my ear there sometime. You definitely hear them going crazy with the diagnostic port shorted, so I imagine they'll work during regular operation too.

    Given that it has decided it is now January in November, I don't expect I'll be getting around to it too soon - but once it warms back up into the 40s where it should be, I'll try to go have a listen.

    Given that the wiring is pretty clearly an issue on the coolant sensor, I'm thinking I'll do what you did - put the kind I posted earlier on with the newer-style pigtail (which looks better anyway). I'm thinking I might tee it to work for both that coolant sensor as well as my Dakota Digital sensor that I currently have in the thermostat housing (so I can have a coolant reading at times other than when the thermostat opens).
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.