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  1. #14
    Join Date
    Sep 2001
    Location
    Rochester, New York
    Posts
    1,385
    My 01 did that also.

    Turns out it was "carbon buildup". (02 sensor acting up) The dealer told me I drive to much like an old lady.

    The fix was him flooring it in the parking lot to "release the carbon". I nearly tackled him.

    He told me to either start running high test fuel, fuel additive, or start driving it like it's meant to be driven.

    I started driving a little harder, and it never happened again.

  2. #15
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,870

  3. #16
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,646
    Quote Originally Posted by jpsmith1cm View Post
    Every time one of mine has done that, the fuel pump was bad.
    I would think fuel filter or pump, but we know chevy fuel pumps never go bad.
    Aire Serv of SW Connecticut- Gas heat, dual fuel and central a/c systems installed and serviced

  4. #17
    Join Date
    Dec 2004
    Location
    Washington State
    Posts
    217
    Badass van in your avatar, freeze.

  5. #18
    Join Date
    Dec 2004
    Location
    Washington State
    Posts
    217
    Flashing is bad. Too many possibilities. That's why the codes are stored. Go to Autozone.

  6. #19
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,326
    Quote Originally Posted by freerider View Post
    Flashing is bad. Too many possibilities. That's why the codes are stored. Go to Autozone.
    Flashing is not "bad," per se.

    It means that the engine control module (ECM, PCM, etc) is operating in its minimum operating mode. We used to call it "limp in" or "limp home" mode.

    In this case, the vehicle is being prevented by some subsystem or systems from operating properly. A scan of the history codes will tell you the specific area that is setting the code, but be aware of this: the codes describe the AFFECTED systems.They are not always the CAUSAL problem. That's why every code has a diagnostic tree that should be followed.

    Start with a review of maintenance, get the scan, and pay for a few pages of an ALLDATA printout from a service facility that will sell it to you. Do the pinpoint testing and work from there.

    What is the model, year and engine for this truck?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  7. #20
    Join Date
    Dec 2004
    Location
    Washington State
    Posts
    217
    By bad I mean not something you want to put up with. I have seen service vans that intermittenly had check engine light(steady) and ran fine, passing emissions. Chevy Vortecs leak sometimes in the injection spider, causing a bank rich code. However, if the light was off, they would pass. Never saw one pass when the light had flashed, even if it was off.

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