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sayhuh?

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Posts posted by sayhuh?

  1. Thank you for all of the info sayhuh? It's supposed to warm up a couple days this week so I'm going to have to get my dmm out and start checking these circuits. It's irritating that both codes tell me the same list of crap that could be wrong. I know my vacuum hoses are good since I just replaced them when I changed the motor. I didnt get the code 26 till I hit the.deer a few weeks ago. I think the purge canister is up there somewhere

    I had a problem with my TDi going into Limp Mode. Similar to yours but in a diesel. I replaced all vacuum lines, the actuator and even some of the relays and got nothing, so I know your pain. One other thing to consider, and may sound odd, is the cat. If it gets clogged it will cause too much back pressure problems as well. Too much back pressure might cause the backfire through the intake as the exhaust has no where to go. I could be wrong, but being an older car, it may be this.

    I never fixed mine completely lol, but still averaged 48-50mpg, so I quit trying. Spent too much money on a car with 350k miles on it. :drinks:

  2. Doesn't get better than Alaska for the Northern Lights ;)

    Take some vids and pictures for your southern SMD brothers.

    For reals!!

    It's suppose to be a G3 level. Basically it affects:

    G 3

    Strong

    Power systems: voltage corrections may be required, false alarms triggered on some protection devices.

    Spacecraft operations: surface charging may occur on satellite components, drag may increase on low-Earth-orbit satellites, and corrections may be needed for orientation problems.

    Other systems: intermittent satellite navigation and low-frequency radio navigation problems may occur, HF radio may be intermittent, and aurora has been seen as low as Illinois and Oregon (typically 50° geomagnetic lat.)**.

    found here if interested:

    http://www.swpc.noaa.gov/NOAAscales/

    Being I work with Polar satellites, it is of some concern on the drag and the electronics of some of our older birds (satellites). I doubt it will be real bad, but looking at that scale, it shows the damage these geomagnetic storms can do. Stone age...about right and without a quick recovery. You'd have to launch a new bird in some/ most cases.

  3. Yea, plugs and wires and anything else associated with it.

    Also, found this for your code 26

    Code 26 (according to Haynes):

    > Quad Driver output fault

    >

    > Possible cause: The PCM detects an improper voltage level on the circuit that

    > is connected to the Quad Driver Module.

    >

    > Now, my questions are... What IS the Quad Driver Module, what does it do, and

    > where is it?

    Pretty vague, isn't it?

    First of all, don't panic. Usually, this is not a serious

    problem. Let me explain.

    Code 26 is a *very common* SES indication to get with a Saturn that

    has a few years on it. Most of the solutions, luckily, are not costly.

    However, this may depend on the year of your car.

    Background

    ----------

    The "Quad Driver" is a device in the computer that "drives" electro-

    mechanical devices in the car. Computers run with very little current

    (milliamps or microamps) in their circuits. But the devices that

    turn on your cooling fan, bulbs, or emissions relays may require

    current in a higher range, say tenths of an amp.

    Thus, the computer can't talk very well with such a high current

    device. It needs help, and it gets in in the form of this Quad Driver

    device. The computer sends a signal (very low amps) to the driver, and

    it in turn then signals the electromechanical device to do whatever it

    needs to do with a higher current which that device can use.

    It sort of "drives" the device by remote control.

    Code 26

    -------

    OK, fine, that is the theory. So why the code 26? Well, in almost all

    cases, the actual driver device does not fail. What fails is one of

    the electro-mechanical devices attached to it. The way the SES light

    works, it will come on when either one of the driven devices fails or

    if the driver itself fails.

    The good news is it is usually not the costly driver device. The bad

    news is this is called a "QUAD" driver. That means it drives four

    devices. Even worse, there are usually TWO quad drivers, so you have

    a total of EIGHT devices to check for just this one SES light.

    That's right, code 26 means that one of 8 devices (and a 9th, the driver

    itself), could cause the problem. You have to check 8 different things.

    Probable causes

    ---------------

    I don't have my manual here, but I'll try to remember to post the

    exact devices to check. The following is from memory, so bear with me.

    Also, remember my car is a '91, so this may have changed somewhat in

    following years.

    The QD generally drives things like relays, solenoids and light bulbs.

    There are a few things that are easy to check, like the bulbs and

    relays.

    The SES bulb and (I think) "HOT" bulb are driven by this device. You

    should check that they both come on when you put the car to "on" before

    starting. Of course, the SES must work, since it came on for you.

    Then the A/C relay and Cooling fan relay are driven. For A/C, simply

    check that your A/C works OK. The relay is pretty silent, unlike

    some cars, so you can't always hear it click. Just make sure it works.

    The cooling fan can be checked when you sucked out the code. Since you

    know how to get the code, you should have noticed that the FAN comes

    on for a while before getting the code out. (The bulbs also light.)

    If the fan isn't coming on, check the relay. The Haynes manual probably

    tells you exactly when the fan comes on during the procedure.

    The relay is accessible in the under-hood fuse block.

    After that, it gets tougher. You have to check some emissions solenoids.

    From what I've read, the MOST COMMON cause of code 26 is either the

    EGR solenoid or the canister purge solenoid. The EGR solenoid is

    real easy to access. It sits right above the EGR valve and takes a minute

    to disconnect on Sx2 models. The canister purge solenoid is a pain.

    It is attached to the block on the firewall side. You have to take it

    out blindly by putting your hand through a small "hole" between all the

    hoses and wires.

    I forgot what else is controlled by this device. I'll try to get

    my manual tonight to look.

    I had an SES light last spring. In my case, I guessed wrong.

    I narrowed my SES last year down to the CPS or the EGRS, and incorrectly

    deduced the CPS. What a pain to replace this. But I was wrong. That

    wasted $20. My problem was the EGRS, and it was also a $20 part. Very

    easy to replace.

    I should mention that my symptoms were opposite of yours. Mine would

    come on only while driving for a while, then go off when I stopped.

    I should also mention that the CPS and EGRS are common causes of

    code 26, and the irony is they are both Nippondenso parts, made in

    Japan. How ironic!

    Either way, if you take it for service, the Saturn diagnostic computer

    should be able to discern between the two or any other device that

    is causing this code. They can read more information than we can

    by just pulsing out codes.

    So, depending on your skill and your luck, you may or may not want to

    try this. Like I said, most of the them are easy, thus even if Saturn

    service does it, it usually is not costly.

    ==== Quote Off ====

    And a followup:

    ==== Quote On ====

    This is a follow up to yesterday's post about a "quad driver" fault.

    Yesterday I mentioned the causes for a "code 26" fault with the

    SES light. There I detailed the following causes:

    1) SES light burned out

    2) "HOT" light burned out

    3) A/C relay

    4) Coolant fan relay

    5) EGR solenoid

    6) Canister purge solenoid

    I couldn't remember the other two causes. Remember, the "quad" in

    the driver means it controls 4 outputs. Since there are 2 QDMs,

    they control 8 outputs.

    The other missing items to check are:

    7) Speedometer output

    8) Upshift/Shift to D2 bulb

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