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Help identify this wire and device

Discussion in '206/246' started by solly, Jun 10, 2013.

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  1. solly

    solly Formula 3

    Jun 2, 2001
    1,148
    Westchester NY
    Full Name:
    Dr. Steven S.
    #1 solly, Jun 10, 2013
    Last edited by a moderator: Sep 7, 2017
    Pulled the airbox for a cleaning and filter change. Found a wire I can't identify. It comes off the bundle strapped to the firewall just behind the dipstick, then splits into 2 wires. One is a female spade connector not attached to anything. Nor does it look like there is anything nearby it could connect to.
    The second goes to a connector and emerges as a thin white wire with a black stripe which then connects to some device (sensor?) with a gold/black top just in front of and below the left carb (for cylinder #3). I checked the repair manual but I'm terrible at reading electric schematics.
    I am attaching pics. Thanks for any help.
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  2. possum

    possum Formula Junior

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    #2 possum, Jun 10, 2013
    Maybe the water temp transmitter?
     
  3. TonyL

    TonyL F1 Rookie

    Sep 27, 2007
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    #3 TonyL, Jun 10, 2013
    That's the water or low oil pressure transmitter, cannot remember which.
     
  4. Nuvolari

    Nuvolari F1 Veteran
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    #4 Nuvolari, Jun 10, 2013
    The gold sensor in your photo is the oil pressure sender.

    The other wire looks to go to the water temp sensor that is located on the forward head between two spark plugs. It will look like a hex head bolt with a male spade connector coming off the middle of it.
     
  5. solly

    solly Formula 3

    Jun 2, 2001
    1,148
    Westchester NY
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    Dr. Steven S.
    #5 solly, Jun 10, 2013
    Thanks all. All my gauges are working and accurate so possibly that unattached female spade goes to a sensor not hooked up to a gauge (maybe an idiot light sensor?) Any way, it's been this way for at least 12 years and everything seems to be working fine, so I'll just wrap the wire in self vulcanizing tape to protect it. Seems very fragile.

    This started out as as simple oil change and tuneup. Now I'm going nuts trying to make sure there are no loose connectors, dangling wires, and changing oil and air filters. Going to try the K&N filter and see if it makes any difference.

    I did find that the hose from the air canister filter to the airbox horn had partially slipped off the horn. My carbs were sucking unfiltered engine air. And this engine was rebuilt only 1200 miles ago. There was no clamp in sight, and because USA cars have that complicated oil pressure-activated flap in the horn (which I hope everyone has removed and plugged by now-it's dangerous) the hose only goes onto the air horn about an inch before butting up against the oil pipe bung. Not a lot of room to secure a hose to. Almost makes me want to spend the $600 or so for a Euro airbox without the bung. Came very close to pulling out the dremel to grind it off but that might create other problems like air leaks.
    Thanks for the help.
     
  6. alhbln

    alhbln Formula 3
    Consultant Owner

    Mar 4, 2008
    1,750
    Berlin, Germany
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    #6 alhbln, Jun 11, 2013
    The unconnected wire looks like the oil pressure sensor to the red pressure warning light wire as you have already assumed. The wire color should be grey. The oil pressure switch is installed from below on the 'L' shaped pipe coming from the oil filter base and going to the tube from the heat exchanger.

    Sometimes when the 'L' shaped pipe/tubing is exchanged, a replacement without the socket for the oil pressure sensor is installed, resulting in the disconnected sensor wire.
     
  7. ferrarioldman

    ferrarioldman Formula 3
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    #7 ferrarioldman, Jun 13, 2013
    Last edited by a moderator: Sep 7, 2017
  8. dignini

    dignini Formula 3

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    #8 dignini, Jun 13, 2013
    Wow! Some avatar!!
     
  9. nerodino

    nerodino Formula 3
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    #9 nerodino, Jun 13, 2013
    That stone needs some Green Green Grass of Home around it........it's Not Unusual!
     
  10. solly

    solly Formula 3

    Jun 2, 2001
    1,148
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    Dr. Steven S.
    #10 solly, Jun 13, 2013
    Thanks Tom. What does that sensor do? As I mentioned, all gauges are working, as is the red low pressure oil light which comes on briefly when I start the car. So what is not being monitored with that connector hanging loose?

    Another question: What does the "crankcase pressure limiting valve" actually do? I've seen cars with airbox removed and individual filters placed over each carb. I assume they just plug the main hose and the 2 small manifold hoses?
     
  11. ferrarioldman

    ferrarioldman Formula 3
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    #11 ferrarioldman, Jun 13, 2013
    It's a hobby. findagrave.com
     
  12. ferrarioldman

    ferrarioldman Formula 3
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    #12 ferrarioldman, Jun 13, 2013
    That is the coolant temp sender. Maybe take your wire and ground it with the key on and watch your gauges to see if something happens. Is there anything connected to your sender?

    Crankcase ventilation. (Like a PCV)

    What year is your car?
     
  13. dignini

    dignini Formula 3

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    #13 dignini, Jun 14, 2013
    Tom Jones fan?
     
  14. dignini

    dignini Formula 3

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    #14 dignini, Jun 14, 2013
    Thanks. Slightly off topic question
    In the end was it the grave of Richard III they found?
     
  15. nerodino

    nerodino Formula 3
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    #15 nerodino, Jun 14, 2013
    Not particularly,but its nice to know that he is on this site!
     
  16. dinogts

    dinogts Formula 3
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    #16 dinogts, Jun 14, 2013
    "Nice to know that he" - he who? - Tom Jones - or a Tom Jones fan - "is on this site"? ;)
     
  17. dm_n_stuff

    dm_n_stuff Four Time F1 World Champ
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    #17 dm_n_stuff, Jun 14, 2013
    Tom is a Ferrari mechanic. Which really doesn't do justice to Tom, but I don't know how else to describe him.

    He has quite a solid reputation as a top notch wrench. there, that's a little better.

    And he can carry one hell of a tune as well. :D

    D
     
  18. swift53

    swift53 F1 Veteran
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    #18 swift53, Jun 14, 2013
    I know him! It's not unusual, to hear of him in the right circles...:)

    Regards, Alberto
     
  19. swift53

    swift53 F1 Veteran
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    #19 swift53, Jun 14, 2013
    My Dino has a Tom Smiths fan. I really ignore if the same.

    Regards, Alberto
     
  20. champtc

    champtc Formula Junior

    Apr 18, 2004
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    #20 champtc, Jun 14, 2013
  21. dignini

    dignini Formula 3

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    #21 dignini, Jun 15, 2013
    don't know Tom smith, but if they sound the same way, as they get old, I'll pass
     
  22. ferrarioldman

    ferrarioldman Formula 3
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    #22 ferrarioldman, Jun 16, 2013
    Afraid I'm not familiar with that.

    Poor Solly. He was just looking for a little help with a wire..........
     

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