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  1. #1

    Question Engine shudders or misfires on acceleration

    1992 Chevy C1500, 5.7L V8, 700R4, TBI. Recently replaced Ignition Control Module that was tested and shown defective, reluctor(pickup) tested ok, Ign coil tested ok. Also replaced Cap and Rotor, old ones looked burned on contacts.

    New problem: Engine shudders while accelerating under load, shudder more pronounced with AC on. Prior to ICM & cap und rotor replacement, engine had smooth and steady acceleration. All vacuum hoses connected. Firing order ok. All fluids ok. No bad codes.
    Is it possible to incorrectly install ICM, distributor cap or rotor?? Thinking I goofed somewhere....

    Any ideas?
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  2. #2


    I would check your wires. You may not have one on all the way or not have them all in the correct place.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  3. #3


    Thanks. Decided to replace the wires, will report back with an uodate....

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