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Discuss Can a code be read without the tool 94 GMC in the alt.autos.gm forum at Car Dealer Forums; Is there a trick to read the code by counting the flashes on a 94 ...
  1. #1
    no one that you know
    Guest

    Default Can a code be read without the tool 94 GMC

    Is there a trick to read the code by counting the flashes on a 94 GMC
    4.3 vortec.
    I was out again last weekend and again the engine light comes on when I
    am towing my camper.....I got 306 km's out of that tank Brutal.
    Other than the CPI leaking and the o2 sensor that I have allready
    replaced what is the most common sensor to fail on these units?



    › See More: Can a code be read without the tool 94 GMC

  2. #2
    Shep
    Guest

    Default Re: Can a code be read without the tool 94 GMC

    Get it scanned for the codes.
    "no one that you know" <nooneshome@shaw.ca> wrote in message
    news:44F21BD9.D8A4C6C2@shaw.ca...
    > Is there a trick to read the code by counting the flashes on a 94 GMC
    > 4.3 vortec.
    > I was out again last weekend and again the engine light comes on when I
    > am towing my camper.....I got 306 km's out of that tank Brutal.
    > Other than the CPI leaking and the o2 sensor that I have allready
    > replaced what is the most common sensor to fail on these units?




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  3. #3
    aarcuda69062
    Guest

    Default Re: Can a code be read without the tool 94 GMC

    In article <44F21BD9.D8A4C6C2@shaw.ca>,
    no one that you know <nooneshome@shaw.ca> wrote:

    > Is there a trick to read the code by counting the flashes on a 94 GMC
    > 4.3 vortec.
    > I was out again last weekend and again the engine light comes on when I
    > am towing my camper.....I got 306 km's out of that tank Brutal.
    > Other than the CPI leaking and the o2 sensor that I have allready
    > replaced what is the most common sensor to fail on these units?


    If it has a 14 pin ALDL and cavities "A" and "B" are occupied,
    you can jumper those two and count check engine light flashes.

  4. #4
    Steve W.
    Guest

    Default Re: Can a code be read without the tool 94 GMC

    no one that you know wrote:
    > Is there a trick to read the code by counting the flashes on a 94 GMC
    > 4.3 vortec.
    > I was out again last weekend and again the engine light comes on when I
    > am towing my camper.....I got 306 km's out of that tank Brutal.
    > Other than the CPI leaking and the o2 sensor that I have allready
    > replaced what is the most common sensor to fail on these units?


    GMC Jimmy - YES - The 94 was the last year for the old square body
    design and was still OBDI Look under the dash around the steering
    column. Find the 12 pin DLC connector. Using a paper clip, small piece
    of wire or a commercially available "code reader", ground terminal "A"
    to "B". There should only be five (5) terminals in this connector, four
    along the top and one on the bottom. Above the one on the bottom (M), is
    terminal A and B.

    After grounding A to B, turn ignition key ON, do not start engine. The
    MIL will start to flash. One flash, short pause, two flashes, long
    pause, subsequent flashes. This is code 12 indicating the computer
    diagnostics is working. It will repeat two more times for a total
    of three code 12 flashes, then any stored trouble codes will display,
    repeating each 3 times. Code 12 will flash again when all codes have
    been displayed. Once you have the code either post it here OR go to

    http://www.troublecodes.net/GM/ for a rundown of the codes and what they
    mean.

    GMC S/T - MAYBE - This was the year of changeover to the new body style.
    That vehicle could be OBD I, OR OBD II depending on build date.

    GMC Full sized - Yes - These were OBDI until 95

    Count the pins on the ALDL connector
    12 pins = OBDI
    16 pins = OBDI.5 or II
    OR look on the vehicle emissions label under the hood. It will tell you.

    Most common failures - CPI, Fuel pressure regulator, Fuel lines (Nut
    Kit), EGR (gets blocked open by carbon), Intake gasket leaking into
    engine on the ends of the manifold.

    --
    Steve W.
    Near Cooperstown, New York

    Life is not like a box of chocolates
    it's more like a jar of jalapenos-
    what you do today could burn your ass tomorrow!

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  5. #5
    no one that you know
    Guest

    Default Re: Can a code be read without the tool 94 GMC

    How much is one of these dam scanners I cant find anyone local to do it
    for a fare price.

    Shep wrote:
    >
    > Get it scanned for the codes.
    > "no one that you know" <nooneshome@shaw.ca> wrote in message
    > news:44F21BD9.D8A4C6C2@shaw.ca...
    > > Is there a trick to read the code by counting the flashes on a 94 GMC
    > > 4.3 vortec.
    > > I was out again last weekend and again the engine light comes on when I
    > > am towing my camper.....I got 306 km's out of that tank Brutal.
    > > Other than the CPI leaking and the o2 sensor that I have allready
    > > replaced what is the most common sensor to fail on these units?

    >
    > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
    > http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
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