What's this sensor?

  1. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #1
    Hi all, I'm really baffled on what this sensor is, I THINK its the air temp sensor but not sure, its located on the top of a vts throttle housing, right at the front above where the accelerator cable attaches to the butterfly valve...there are 3 other sensors on the same houseing (TPS, ICV and air flow meter), if you take it out it looks like a mini radiator fan switch (only in a black casing with a 2 pin plug running to it) soooo what is it and what's it do? Lol

    I have a mk1 single plug vts, its really bugging me,

    Thanks

    found a picture...(very hard when you dont know what its called haha)

  2. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #2
    Anyone help please?
  3. Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.
    #3
    I always thought it was some kind of air temp sensor too. It's the only thing it can be really =/

    Why do you want to know?
  4. Regular Poster Joined: Sep 2011 Hertfordshire Posts: 250 2000 Saxo Woodland Green VTS, 2002 Mazda MX5
    #4
    if its twin pin id defo say its the inlet air temp sensor, looks just like a coolant temp sensor only the area submerged in flow is significately smaller and the plug connection end looks identical to all temperature sensors
  5. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #5
    your thinking of the wrong sensor monkey...the air temp sensor looks like this:



    the sensor in question is located at the front of the housing (item number 1 in the picture)

  6. Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo
    #6
    its the reheating probe dont ask me what it does because i dont know lol

    number 2 is the ICV
    number 3 is hte TPS
    number 4 is the IAT
    number 5 is the FPR
    number 6 is the injector wiring i think
  7. Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo
    #7
    item no6
  8. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #8
    ok so now we have discovered its the 'reheating unit' what does it do and what happens if its broken? lol thanks folks x
  9. Saxperience Post Whore Joined: Jul 2010 Morley, Leeds Posts: 8469 Civic ep3 type r powered by TDI NORTH
    #9
    If there anything like on the volvo tb's in the focus st and the rs then they heat the throttle body to 30'c to aid with cold running in the winter.

    Could be wrong though.
  10. Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo
    #10
    Quote:
    Originally Posted by Bedford126 View Post
    If there anything like on the volvo tb's in the focus st and the rs then they heat the throttle body to 30'c to aid with cold running in the winter.

    Could be wrong though.
    ive heard its to do with cold starts
  11. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #11
    so it wouldnt cause a slight miss fire if it was to fail?
  12. Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6
    #12
    I took mine off, it might make it run a little sick when cold but once warm no different.
  13. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #13
    so what the hell is causing my random misfire? it only does it when it wants to, no patern at all, doesnt matter if its warm, cold, idle or moving /: its had a new coil pack, and sparks, air flow meter, coolent temp sensor, map sensor, you name it its had it...
  14. Saxperience Post Whore Joined: Jul 2010 Morley, Leeds Posts: 8469 Civic ep3 type r powered by TDI NORTH
    #14
    badly gapped plugs?
  15. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #15
    nope, all gaped at 0.9mm
  16. Infrequent Poster Joined: Mar 2012 Maidstone/kent Posts: 106 mango vtr
    #16
    wiring problem loose plug broken wire dodgy temp sens ?
  17. Saxperience Forum Bum Joined: Nov 2006 The Lang Toun Posts: 4133 Mk2 Clio V6 #007 of 354
    #17
    Could be a host of things to be honest. Random misfire's are the worst!

    At least its a saxo and going through the sensors one by one won't break the bank

    Are all the sensors clean? Other ones to try of the top of my head are the engine speed sensor on the front of the gearbox and the lambda.
  18. Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5
    #18
    Quote:
    Originally Posted by jeffchiz View Post
    its the reheating probe dont ask me what it does because i dont know lol

    number 2 is the ICV
    number 3 is hte TPS
    number 4 is the IAT
    number 5 is the FPR
    number 6 is the injector wiring i think
    Whats IAT?
  19. Regular Poster Joined: Sep 2011 Hertfordshire Posts: 250 2000 Saxo Woodland Green VTS, 2002 Mazda MX5
    #19
    do you know what condition the injectors and fuel filter are in?
  20. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #20
    fuel filter brand new, and injectors are near new...
  21. Established Member Joined: May 2010 leicester Posts: 1446 Clio 182 Inferno
    #21
    Quote:
    Originally Posted by Prickle View Post
    Whats IAT?
    Intake Air Temperature ....sensor
  22. Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS
    #22
    Turned out that one of the wires in the gel (that surrounds the end of the plugs) had snapped on my IAT sensor, so new plug and we are sorted, cheers for the help tho guys, it was just hard to see as it was IN the gel haha x