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  1. #1

    Default 92 gmc sputtering

    I have a 92 gmc k1500. When i start it it idels bout 1000 rpm ans when i put it in gear the idle drops to bout 400 rpm and it starts to shake. When im driving it runs ok but going up a hill it starts to shake real bad. I pulled the plugs and i will be replacing them. Im confused on what the problem might be.

  2. #2


    Welcome to the club, it's great to have you aboard. More than likely the plugs will help but I would replace the wires too and then see how it does. I only use AC delco plugs and wires. They just seem to work best.

    2002 Chevrolet Silverado Extended Cab SportSide: See Mods in My Garage

  3. #3


    Ok i have been reading on what else could be wrong and other people have said an iac valve, tps sensor, map sensor . Im going to do a full tune up later today and hopefully it fixes the issue. My truck has no trouble codes.

  4. #4


    Just changed the plugs and that fixed the issue.

  5. #5


    I always use AC Delco parts when doing a tune-up. All that aftermarket crap never seems to last as long.

  6. #6

    mfleetwood's Avatar
    Join Date
    Jul 2010
    Denver, CO
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    Welcome to the Club!!

    I moved your thread to the correct section of our Forum....Glad you found the answer to your problem!

    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

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