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Steady 5/8 light

Discussion in '348/355' started by speedtrapp, Mar 25, 2012.

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  1. speedtrapp

    speedtrapp Formula Junior

    Mar 26, 2007
    308
    Full Name:
    Tommy
    #1 speedtrapp, Mar 25, 2012
    My 93 car the 5/8 light came on and it's steady now. Reset the mass airflow it was 384 right bank and 387 left now there both 383. Switched the o2 sensors still steady 5/8 light. I ordered new walker 02 sensors but I don't think that's it. Any ideas? I cleared the codes hoping it would resolve itself when started fresh. Could it be the cat computer? Is that the box next to the coils?

    Thanks guys
    Tommy
    .
    .
     
  2. ricbowling

    ricbowling Karting

    Jan 21, 2008
    140
    Cascais
    Full Name:
    Ricardo Almeida
    #2 ricbowling, Mar 25, 2012
    remove the 2 useless ecu black boxes near the rear of the car and you will have no more lights nor problems.
     
  3. speedtrapp

    speedtrapp Formula Junior

    Mar 26, 2007
    308
    Full Name:
    Tommy
    #3 speedtrapp, Mar 26, 2012
    Ok guys I'm working on the car I switched the exhaust Ecu and still light on than I switched the thermocouple from the cat and still light steady on,than I pulled the plug on the exhaust Ecu and still steady light, im lost any ideas?
     
  4. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,773
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #4 plugzit, Mar 26, 2012
    Sounds like a cat.?
     
  5. speedtrapp

    speedtrapp Formula Junior

    Mar 26, 2007
    308
    Full Name:
    Tommy
    #5 speedtrapp, Mar 26, 2012
    Even though the car is ice cold, and it still runs fine. Idles smooth. If it was a bad cat would I have other symptoms too?
     
  6. albert328gts

    albert328gts Formula 3
    Silver Subscribed

    Oct 31, 2003
    1,647
    California
    #6 albert328gts, Mar 26, 2012
    See my post over the weekend, and odly enough mine were already disconnected. And like yours its on when its cold and the Cat has not had time to warm up... Am taking mine in tomorrow to see whats up!
     
  7. tcannon

    tcannon Formula 3

    Feb 18, 2009
    1,763
    Norman, OK
    Full Name:
    Todd Cannon
    #7 tcannon, Mar 26, 2012
    Have you pulled the codes yet instead of just clearing them? That would help to know that the car is thinking.
     
  8. speedtrapp

    speedtrapp Formula Junior

    Mar 26, 2007
    308
    Full Name:
    Tommy
    #8 speedtrapp, Mar 26, 2012
    I have to travel to Fla tomorow, when I get back Im going to put it all back toghter disconnect the battery to really clear up the ecu and go for a long ride with a mix of hwy and city and see what codes set. Ill post the outcome when I return in a few days. Thanks for the help.

    tommy
     
  9. speedtrapp

    speedtrapp Formula Junior

    Mar 26, 2007
    308
    Full Name:
    Tommy
    #9 speedtrapp, Apr 8, 2012
    Ok guys here's the latest. I installed the walker 02 sensors in the car than I disconnected the battery for an hour to clear all the codes. Put everything back toghter. Car started right up let it idle for 20 minutes without touching anything. And believe it or not NO CELs, took it out for a mixed ride on hwy and in town car ran great And no lights. Thank you all. Next is a recharge for the ac I have a case of R 12 from the 80s I keept when I used to spin a wrench at Chevrolet.
     

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