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Thread: Emissions fail - high hydrocarbons in exhaust

  1. #21
    Stupid Newbie DaraSue's Avatar
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    I think I found mine. Is this part supposed to unplug?20180828_142006.jpg

  2. #22
    EFI'd dn010's Avatar
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    Location:  Florida: Pinellas County

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    That is it. Pull on it from the end and it should pull out like seen in the photo I posted. You can then disconnect it. It may also just unplug as you pull on it without the whole connector and blue wire coming out. Either way is good.
    -----Dan B.

  3. #23
    Stupid Newbie DaraSue's Avatar
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    So my blue wire comes out the bulkhead and goes into this thing, what is it?

    20180828_144253.jpg

  4. #24
    EFI'd dn010's Avatar
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    Silver box is the “lambda” ECU. Black box with two plugs is the idle ECU.
    -----Dan B.

  5. #25
    Stupid Newbie DaraSue's Avatar
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    I'm trying the test with the sensor unplugged, seems like it idles a little choppy but the valve is buzzing. How hot does it need to get? Up to the unmarked white line?


  6. #26
    Stupid Newbie DaraSue's Avatar
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  7. #27
    Stupid Newbie DaraSue's Avatar
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    It got up to the 220 line and I never heard it stop buzzing but now I've got another problem. My cooling fans didn't come on.

    NOW what?

    (Just tried it again and they still don't come on. When I put the a/c on they finally did. Is it the otterstadt? Thr coolant lines by the radiator are stone cold.)
    Last edited by DaraSue; 08-28-2018 at 05:39 PM.

  8. #28
    Senior Member hippieman9's Avatar
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    My VIN:    06668 81' Grey interior, 5 speed, Grooved hood. Previous owner of 16301, in 2001. Found Nov 2019, a

    Quote Originally Posted by DaraSue View Post
    It got up to the 220 line and I never heard it stop buzzing but now I've got another problem. My cooling fans didn't come on.

    NOW what?

    (Just tried it again and they still don't come on. When I put the a/c on they finally did. Is it the otterstadt? Thr coolant lines by the radiator are stone cold.)
    Sounds like the thermostat is not opening. are the hoses in the engine bay getting hot? also is your Otterstat pointing to the ground?

  9. #29
    Senior Member hippieman9's Avatar
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    My VIN:    06668 81' Grey interior, 5 speed, Grooved hood. Previous owner of 16301, in 2001. Found Nov 2019, a

    Quote Originally Posted by DaraSue View Post
    Is it running with out the O2 sensor in the pipe? sounds like it. that would be an exhaust leak.

  10. #30
    Stupid Newbie DaraSue's Avatar
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    The sensor was in the pipe but the connector was unplugged. I was trying to do the test Nick suggested to see if the frequency valve buzzed when the engine was hot and rule out an electrical issue.

    Engine bay hoses were hot, otterstadt is pointed down & connections seemed ok.

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