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Timing after rebuild

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Rocky91, Aug 7, 2002.

  1. Rocky91

    Rocky91 Registered Member

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    I just finished rebuilding my '91 TBI 350. It started on the first try and sounded good. When I checked the timing it was 12 degrees BTDC. What should the timing be for this engine? I set it to 4 degrees BTDC but when I drove it, it didn't have any power. Thanks.
     
  2. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    It is important to remember that there is a brown with white stripe(IIRC or it might be purple) wire over by the fuse block that has to be disconnected to correctly set the timing. It will emerge from the wire loom shielding and it will have a male and female type connector on it. Just unplug it and set your timing, then plug it back together.

    Hope this helps!

    Mike
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Set it to 0 degrees with the wire unplugged. The computer will automatically advance it when you plug that tan wire with the black stripe back in. Make sure to do all the plugging and unplugging with the engine off.
     
  4. wheelin72

    wheelin72 Registered Member

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    so on TBIs all the timing is automatic?
     
  5. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    In the words of Hank Hill, "Mmmmhmm, yep".
     
  6. Rocky91

    Rocky91 Registered Member

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    Thanks for the help. I couldn't find the wire, I'll try again in the morning.
     

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