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  1. #1
    Jr. Apprentice SkiBurban's Avatar
    Join Date
    Sep 2008
    Northern California

    Default Hello - Oh, and a warm running problem

    Good Morning.
    My 1992 Suburban is giving me fits with its warm running problem. I have chased problems from bumper to bumper, but the symptoms continue.

    Some history; we purchased the 1992 K2500 7.4 Suburban with 190K miles on it, and it ran fine. It was parked for >6 months, while I had other irons in the fire.
    I took it to be smogged, and it passed with flying colors. The most significant mechanical problem at the time was an annoying shifting problem, were it felt like the transmission was getting no speed input. I chased that problem down, with a replacement wiring harness and computer solving that problem.

    I performed a standard tune-up; plugs, cap, rotor, wires, fuel filter, oil and filter change. Also, I changed the thermostat because it was stuck open.

    It started having a hesitation problem, where it felt like 2 cylinders were falling out, so I changed out the coil, and added an MSD ignition system. No change.

    I narrowed the symptoms down to being worse when warm, thinking maybe a lean-condition. I changed out the fuel pressure regulator and distributor pickup sensor, and the throttle position sensor. No change.

    Anyway, it's driving me crazy. I still haven't figured out the problem, and I'm tired of throwing parts at it. Should I head to the dealership? Any thoughts, and help would be GREATLY appreciated.

    Thank you,
    2005 K1500 Suburban LT 50K miles - All Stock

    1992 K2500 Suburban 200K miles - Still Running:rofl:

  2. #2

  3. #3


    Welcome to the might get more responses if you post in the tech section.

    Bobby - North Carolina
    2008 4x4 5.3L V8
    6" Suspension Lift and 1.5" Body Lift
    20x9 Ballistic Jesters w/35" Toyo Open Country MT's & 1.5" rear wheel spacers
    4:56 Yukon Gears
    Hypertech Speedometer Calibrator
    Baja style bed mount spare tire carrier
    Flowmaster 40 series dual exhaust
    Recon Smoked LED tails/3rd brake lights/black projectors w/switchback LED's in the corners
    N-Fab Nerf Steps
    K&N CAI
    No Fear Pedals
    Tint, Line-X bedliner, Window visors, Rear wheel well liners
    Painted front grill, bow ties and door badges, de-"lettered" tailgate
    Powder coated front and rear bumpers

  4. #4


    Welcome to the site!


    '94 Chevy Suburban K1500
    3" exhaust w/ aero turbine non-baffled muffler
    CFM Technologies TB spacer
    CB w/ 44" whip antenna

  5. #5

    Join Date
    Feb 2008
    Red Wing, Minnesota, United States


    Welcome to the site, try a MAP sensor, some cars also have an IAC and that can do the same thing, the IAC you can actually take apart and clean
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual

  6. #6


    Welcome to the site!
    Michael, 17, CA

    2005 Silverado - See my garage for my mod list

  7. #7


    Welcome to the site!

    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  8. #8
    Master Mechanic zubbiez's Avatar
    Join Date
    Feb 2009
    Eagle Mountain Utah


    wlcome to the site.........
    2000 Silverado Z71 Whipple Supercharger, JBA Headers,3" cat back Flowmaster Exhaust, Volant cai, Pioneer Preimer deck,Orion subwoofer,03 signal light mirrors,03 taililghts

  9. #9
    Master Mechanic
    Join Date
    Sep 2008
    Dallas, Texas
    Blog Entries


    Welcome to the site
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  10. #10


    Welcome to the site!

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