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Warning Light

Discussion in 'Z32 300ZX' started by ChrisBlackzx, Sep 10, 2007.

  1. ChrisBlackzx

    ChrisBlackzx Forum User

    Hi All,
    Can anyone tell me what the 3rd warning light on the left side of the dash means please.Its located inbetween the door open and hanbrake light,
    Reason being im losing power in lower revs and this light keeps coming on.
    Any advice would be helpful as i have searched the web to try and find this answer
    Cheers
    Chris
     
    Last edited by a moderator: Sep 11, 2007
  2. wow300

    wow300 Active Forum User

    It sounds like the over heater cat indicator without going out and have a look !
     
  3. JEZ 280ZX

    JEZ 280ZX Well-Known Forum User

    Hi,
    It is the cat overheat light......

    [​IMG]

    Worth checking the coilpack connectors to make sure all plugs are firing, as unburnt fuel from a misfiring one can get into the cats and cause them to overheat.... therefore rough running, lack of power etc. is also present.
     
    Last edited by a moderator: Sep 10, 2007
  4. ChrisBlackzx

    ChrisBlackzx Forum User

    Thank you, i will check that today
    chris
     
  5. alanz

    alanz Well-Known Forum User


    hi chris

    imho i would remove the cats and the sensor and fit decat pipes, a good exhaust or mech will do the job for you, then no need to worry about cats over heating!!


    alan
     
  6. JEZ 280ZX

    JEZ 280ZX Well-Known Forum User

    Hi,
    Decatting the exhausts can lead to accelerated failure of the turbo seals on a TT model though!
     
  7. keitht6064

    keitht6064 Active Forum User

    Yes but you can get flames thru the exhaust.......
    Na owners will not get the same effect..... not to the same degree
     
  8. Legrath

    Legrath Well-Known Forum User

    That will not cure his problems.

    The Cat overheat light is coming on becuase 1 or more cylinders are not sparking and the unburnt fuel is then igniting in the Exhaust system.
     
  9. alanz

    alanz Well-Known Forum User


    MY OVERHEAT CAT LIGHT WAS COMING ON AND CUTTING POWER TO THE ENGINE.

    REMOVED CATS AND WIRING, FITTED NEW PIPES AND HAVE HAD NO PROBLEMS SINCE.

    HAD THEM DONE OVER 2 YEARS AGO.

    MAYBE THE LIGHT IS A SIGNAL FOR A MULTITUDE OF PROBLEMS.
     
  10. Legrath

    Legrath Well-Known Forum User

    The light signals that the cat is overheating becuase unburnt fuel is igniting in the exhaust system.

    The sensor is connected to the light on the dashboard only, and can not cut power or have any affect on the car at all. It is a warning light only.
     
  11. alanz

    alanz Well-Known Forum User

    IT SEEMS ODD THAT THE LIGHT WAS COMING ON AND I HAD POWER LOSS AT THE SAME TIME. WHAT DO THINK WAS CUTTING POWER TO MY ZED?

    I THOUGHT IT WAS THE SENSOR CUTTING POWER TO STOP DAMAGE TO THE CAR/EXHAUST SYSTEM.
     
  12. Legrath

    Legrath Well-Known Forum User

    The reason for the light coming on was same reason for the power loss (rather than the sensor putting the car into any form of safety mode) - either severly overfuelling or missfiring spark not igniting the fuel.

    If its an intermittent fault that has since cured itself then its likely to have been either the MAF/AFM that was wet at the time or you have a bad connection to either the PTU or the coilpacks.
     
  13. alanz

    alanz Well-Known Forum User

    YOU GOT IT BUDDY!!!!!

    I REMEMBER NOW, I HAVE A HKS INDUCTION KIT AND THE FILTER WAS VERY OLD AND BREAKING UP, THUS STICKING TO THE MAF SENSOR AND CUTTING POWER.

    CHANGED THE FILTER AND PROBLEM SOLVED!!

    LEGRATH YOU HIT THE NAIL ON THE HEAD!:bow:

    ALANZ
     
  14. domtheboyo

    domtheboyo Forum User

    Hi, if my cat warning light CMS on when I booted it, could this be the same thing or would I see the warning light come on regularly if it was just a connection issue?
     

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