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Thread: Timing my 90 454ss

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  1. #1
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    Timing my 90 454ss

    i was wondering were the plug is to bypass the timing advance so i could time my truck properly

  2. #2
    GMC RULZZ NEUMANNZZ's Avatar
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    Re: Timing my 90 454ss

    should be behind the wiring loom behind the plastic cover on the passenger side firewall just left of the engine. looking for a tan and black stripe wire with connector. set timing to zero degrees.
    Last edited by NEUMANNZZ; 03-20-2006 at 09:34 AM.
    O2 GMC RCSB 4.8L V8 AUTO 3.73's
    rebuilt/beefed up 4L60E(at 43,000miles)
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  3. #3
    Registered User 454ss's Avatar
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    Re: Timing my 90 454ss

    Quote Originally Posted by NEUMANNZZ
    should be behind the wiring loom behind the plastic cover on the passenger side firewall just left of the engine. looking for a tan and black stripe wire with connector. set timing to zero degrees.

    click signature for pics
    90 454ss
    92 454ss
    08 Avalanche

    I wish people were like slinkys, fun to play with but when I get bored I can push them down the stairs.

  4. #4
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    Re: Timing my 90 454ss

    no ****. thanx im use to the HEI

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