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  1. #1

    Default AFM turning on and off continuously

    I had the dealer change out the intake and exaust with the GM cold air intake and dual exaust. Now the AFM changes from 4 to 8 cyclinders about every 10 to 30 seconds. I live in florida and the roads are almost without expection stright and flat so incline and lateal pressure are not the issue. Does the computer need to be reprogramed? The dealer says no but their not always right. If anyone can help I'm all ears. 2008 Silverado 1500 5.3engine
    Last edited by gregstruck; 10-30-2008 at 08:07 PM. Reason: Left out the year make and model

  2. #2

    Join Date
    Aug 2008
    East of Branson, Missouri
    Blog Entries


    You've neglected to include your vehicle's information. Year, model, mileage? This may help in better poinpointing an accurate answer for you.

    "The Sarge"
    1999 Chevy Suburban LT- K2500
    7.4 454 Vortec, 4WD
    305/70/16 on Eagle Alloy

  3. #3

    dwill3015's Avatar
    Join Date
    Jan 2007
    Yacolt, Washington
    Blog Entries


    Welcome to the site! I would say it is a programming or a sensor issue. Since the dealer did the work for you, keep on them about correcting the problem. If not, take it to another dealer.
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

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