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Thread: 87 Thunderbird 3.8 code 13

  1. #11
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    Ok Softtouch,
    I just read codes again and have several, I used the test light method.
    KOEO
    13, 14, 31,
    KOER
    12, 13, 16
    As for where I have got my information for bench testing the ISC I have been reading myself cross eyed trying to troubleshoot this car. There is a lot of information out there in cyber world not sure exactly where I found any of it.
    I am still confused how doing the self test with a test light
    Made the selonoids function? I have ran many self tests and this has not happened and to have vacum back at the heating rod in the intake is bizarre.
    I have a bright and shinny new ISC and a new EEC, ECM, PCM on its way.

  2. #12
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    Just so you know Softtouch I really appreciate your time, knowledge and patience with me.

  3. #13
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    in the EVTM's ,, make sure your on the "right page" at the top and you see that the diagram is for the "3.8L".

    most all the prints will show that they are for the 3.8L and 5.0, because they are the same believe it or not.

  4. #14
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    Ohm values for ISC
    Old 3.1 ohms tracking switch
    New 9.5 ohms tracking switch

    New ISC motor 20.56 Mega ohms
    Old ISC motor 6.4 Mega ohms

    There is quite a difference

  5. #15
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    that was pretty cool...

    i was able to secure my meter leads to the tracking switch terminals....

    then...........i got some sort of resistance that isnt anywhere near yours,, (i was like 35k)

    but.......

    i then pushed on the plunger a tad and the meter went to "OPEN".

    let go of the plunger and it goes back to a resistance reading.

    i think its like i mentioned earlier,,, there might be crud up inside your motor and that tracking switch itself is dirty,, the eec might need to see a particular resistance in order to trigger voltage delivery out to the motor winding leads.

  6. #16
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  7. #17
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    Two self tests tonight with new ISC first was similar to yesterday
    The second test KOEO code 11 PASS
    KOER still have codes 12 and 16

  8. #18
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    If the KOEO codes were "M" (Memory) codes and if you disconnected the battery, the codes have been reset.

    KOER:
    12--Self test could not reach fast idle RPM spec.
    16--RPM above the self test spec with the ISC motor fully retracted.

    Were you able to do the ISC adjustment procedure with the new ISC?
    Have you ever been able to see the plunger move?

  9. #19
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    I replaced the EEC and the ISC is now functioning I believe the throttle position sensor is also now in the game, what a difference.
    The ISC does in fact retract in self test mode when things work together.

  10. #20
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    Good news!

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