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Running rich

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by trivers, Nov 14, 2007.

  1. trivers

    trivers New Member

    What else should I replace/adjust it seams to be running really rich you can smell it pretty bad at idle. So far I replaced fuel filter, plugs, wires, cap, rotor, O2 sensor. It is a 1993 k1500 suburban, that had been sitting for a year with bad tranny when I got it. So I just need to know where to go next?
  2. homer911

    homer911 Rockstar 100 Posts

    It could be your fuel pressure regulator or IAC. Un plug IAC and see if it clears up at all
  3. fschevy1988

    fschevy1988 New Member

    i would check the timing, and the injector pods to see if they are spraying heavy
  4. trivers

    trivers New Member

    Is the timing adjustable on a 1993?
  5. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    The 96 & up with SFI are not adjustable. To adjust the timing on the 93, first bypass the EST system by unplugging the tan/black wire that is located under the relay cover underhood on the passenger side firewall. Then loosen the distributor and set the timing to spec with a timing light.
    [​IMG]
  6. trivers

    trivers New Member

    what is the spec for timing in the Chilton it just has a circled 1?
  7. trivers

    trivers New Member

    Ok now since the book is useless. What it the correct pointer for BTDC? I am assuming the slightly larger pointer that is closest to the drivers side? currently it is in the valley right after.
  8. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    Haynes specs the timing as TDC, unless the smog label underhood has a different spec.

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