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Thread: Help me decipher Codes for my sc :O)

  1. #1
    Join Date
    May 2002
    Location
    NYC
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    Help me decipher Codes for my sc :O)

    Ok finally my car (94 sc automatic)did the christmass tree thing again and I hooked up the good ol trusty MATCO scanner,,Here's what I got.

    Stored codes were 176 I believe bank 1 lean
    and 543 Secondary fuel pump circuit

    Now I believe 176 refers to a bad o2 possably but what about 543?...help?

    Also when doing the engine run test when it asks to blip throttle and al that crap I got a 136 which was lean bank 2
    and a 225 which I think was knock sensor..Which is brand new however in this heat and humidity with my boost I'd assume it would go off..


    So basically change O2's and????....Any idea guys


    Thanks ..Damon
    They don't call me "SLOWPOKE" for nothin!
    http://www.sccoa.com/forums/garage_v...vehicle&id=110
    Quote Originally Posted by ricardoa1 View Post
    I love the filter. Its pimp. paper element and 10Mircron filtration, 12" long cause size matters.

  2. #2
    Join Date
    May 2002
    Location
    NYC
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    ANYONE????
    They don't call me "SLOWPOKE" for nothin!
    http://www.sccoa.com/forums/garage_v...vehicle&id=110
    Quote Originally Posted by ricardoa1 View Post
    I love the filter. Its pimp. paper element and 10Mircron filtration, 12" long cause size matters.

  3. #3
    Join Date
    Apr 2002
    Location
    Forked River, NJ
    Posts
    2,092
    543 is "Fuel Pump (FP) circuit open connection - Electronic Control Assembly (ECA) to battery".

    Maybe you're getting lean codes because the fuel pump isn't getting enough juice.

    I'd check all the fuel pump wiring if it were me.
    Last edited by DLF; 06-28-2003 at 01:33 AM.

  4. #4
    Join Date
    May 2002
    Location
    NYC
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    I could also be running lean because I have stock injectors and 21 psi...Anyopne else have any ideas before I go ripping through it?
    They don't call me "SLOWPOKE" for nothin!
    http://www.sccoa.com/forums/garage_v...vehicle&id=110
    Quote Originally Posted by ricardoa1 View Post
    I love the filter. Its pimp. paper element and 10Mircron filtration, 12" long cause size matters.

  5. #5
    Join Date
    Sep 2003
    Location
    Oklahoma
    Posts
    132

    Fuel Pressure

    Key on - 35-45
    @ Idle 30-45 Vacuum Hose attached to reg.
    @ Idle 40-50 Vacuum Hose detached to reg.
    Hold pressure after 5 min. 30-40
    max pressure 65


    ck. voltage @ fuel pump relay to pump location #4 pink/ black wire

  6. #6
    Join Date
    Sep 2003
    Location
    Oklahoma
    Posts
    132

    code 176 / 543

    Let me know what you find. We are trying to trace down wiring problems on a friend of mines '92 sc. code 176 / 212/ 542

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