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  1. #1
    Jr. Apprentice andrewh's Avatar
    Join Date
    Jan 2010
    Boyne City Mi.

    Default EGR valve boogers

    Had a hard time starting my '95 blazer with a 4.3l. It idled like crap and was just kinda a pain. Hooked up a scanner and it had a "EGR pintle position control problem" I removed the egr valve expecting to have to replace it and found it to be stuck open with a piece of hard black debris. I cleaned it and reinstalled it. Everything is happy now. Anyone else have issues like this? Where do such deposits originate? Is it time to run premium fuel? -Andrewh

  2. #2
    Master Mechanic tattooed4life's Avatar
    Join Date
    Apr 2008
    Stevensville MI


    I have had replace mine also, I did get away with cleaning it a couple of times but that only lasted for so long. Try running some seafoam thru the fuel system this may help in cleaning up the deposits.
    1997 Chevy K3500
    4x4 X-Cab Dually
    454 Dual Exhaust

  3. #3
    Jr. Apprentice andrewh's Avatar
    Join Date
    Jan 2010
    Boyne City Mi.


    Seafoam, will-do. Thanks.

  4. #4


    This is a common problem w./ the 4.3L egr valves. Cleaning the crud out helps, regular applications of seafoam via the brake booster vacuum hose keepse it to a minimum. The CES will goi away once you clean it.
    Still Loyal to GM after all these years...:shocked:
    2006 Impala LT 3.5L
    2005 Silverado WT small cab/longbed 4x4 4.3L V6
    1999 Grand Am 3.4L in TX w/ our youngest
    1993 GMC Jimmy 4.3L 4 door 4x4 'Ole Rusty' - 'SOLD'
    1988 S-10 small cab/longbed HT3.4L Crate Engine
    1970 Nova 250 I-6, factory 3 sp floor shifter.
    1968 Chevelle 'Nomad' Wagon 250 I-6 w/ 3 on da' tree.

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