1999 gmc suburban - Runs rough and hard to get going

Discussion in 'General Chevy & GM Tech Questions' started by JeffPlumer, Jul 2, 2013.

  1. JeffPlumer

    JeffPlumer New Member

    Bought a burb, we have had it about 4 months, its having problems. It acts like it gets no gas sometimes and has a hard time getting going and runs rough. Replaced fuel filter and ignition module. Still acting up. Any ideas???

  2. donyms

    donyms Epic Member 5+ Years ROTM Winner 1000 Posts

    Welcome to the club, it's great to have you aboard. I would replace the plugs and wires and see how that does. Good luck man. :glasses:
  3. 09mgray

    09mgray Member 1 Year

    Welcome to the Club
  4. Family Force 6

    Family Force 6 Rockstar 100 Posts

    Is the check engine light coming on? If so, go to the local auto parts store and get the codes pulled.
    How many miles on it?
    You can check plug wires by misting water at night in the engine compartment with it running and watch for any visible sparks (mis-fires). I'd do that before replacing. If replacing the plus make sure to use AC Delco.
    Bad O2 sensors (upstream) can wreak havoc.
    Keep us updated and welcome!
  5. K15 Blazer Guy

    K15 Blazer Guy Member 2 Years 100 Posts

    do a vacuum leak check
    seafoam the intake
    clean the TBI
    upgrade the plugs, cap, rotor, and coil.

    that will get you started
  6. mfleetwood

    mfleetwood Epic Member 5+ Years ROTM Winner 5000 Posts

    Welcome to the Club!!!

    I moved your thread here and changed your title slightly to match your topic. This will help in getting you more responses opinions.

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