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348 throttle body and throttle position sensors removal

Discussion in 'Technical Q&A' started by ernie, Nov 27, 2011.

  1. ernie

    ernie Two Time F1 World Champ
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    Nov 19, 2001
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    Hey fellas,

    Today your friendly Brotherhood Stooge is gonna show you how to remove the throttle body from a 348. Then I'm gonna show you how to remove the throttle position sensor.

    There may be better ways of doing this, but this is my way, Stooge style. :D
     
  2. ernie

    ernie Two Time F1 World Champ
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    #2 ernie, Nov 27, 2011
    Last edited by a moderator: Sep 7, 2017
    First disconnect the clip from the throttle position sensor (tps). All you need to do is press and hold down the wire on the top, then side it off the tps.
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  3. ernie

    ernie Two Time F1 World Champ
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    #3 ernie, Nov 27, 2011
    Last edited by a moderator: Sep 7, 2017
  4. ernie

    ernie Two Time F1 World Champ
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    #4 ernie, Nov 27, 2011
    Last edited by a moderator: Sep 7, 2017
  5. ernie

    ernie Two Time F1 World Champ
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    #5 ernie, Nov 27, 2011
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  6. ernie

    ernie Two Time F1 World Champ
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    #6 ernie, Nov 27, 2011
    Last edited by a moderator: Sep 7, 2017
    Now you can go back and remove the intake tube from the throttle body. You don't need to disconnect any thing else. I just left mine sitting there with the rest of the stuff sill connected. I just need the tube out of the way to take the throttle body off.
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  7. ernie

    ernie Two Time F1 World Champ
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    #7 ernie, Nov 27, 2011
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  8. ernie

    ernie Two Time F1 World Champ
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    #8 ernie, Nov 27, 2011
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  9. ernie

    ernie Two Time F1 World Champ
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    #9 ernie, Nov 27, 2011
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  10. ernie

    ernie Two Time F1 World Champ
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    #10 ernie, Nov 27, 2011
    Last edited by a moderator: Sep 7, 2017
    Insert the head of a standard screw driver into one of the slots in the dowel, and loosen the dowel. You do not need to completely remove the retaining dowel. You only need it loosened enough to get the little ball out of the hole in the linkage cup. I unscrewed mine about three complete turns. Once the dowel is loosened enough, take the throttle arm out of the cup.
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  11. ernie

    ernie Two Time F1 World Champ
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    #11 ernie, Nov 27, 2011
    Last edited by a moderator: Sep 7, 2017
    A word of caution.

    DO NOT mess with the adjustment nut on the bottom of the linkage. I'm pointing to it with the tip of the screw driver. If it gets messed up your throttle bodies will not be in synch and then my not open congruently with one another. So again DO NOT fool with the adjustment nut. Matter of fact you should probably make sure it's nice and snug before you remove the TB arm from the linkage.
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  12. ernie

    ernie Two Time F1 World Champ
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    #12 ernie, Nov 27, 2011
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  13. ernie

    ernie Two Time F1 World Champ
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    #13 ernie, Nov 27, 2011
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  14. ernie

    ernie Two Time F1 World Champ
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    That's it for now.

    I'll be back a little later to post up how to remove the Throttle Position Sensor.
     
  15. ernie

    ernie Two Time F1 World Champ
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    #15 ernie, Nov 28, 2011
    Last edited by a moderator: Sep 7, 2017
    Okay I'm back.

    Here is how you remove the Throttle Position Sensor (tps).

    Remove the 2 standard screws holing the tps to the throttle body.
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  16. ernie

    ernie Two Time F1 World Champ
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    #16 ernie, Nov 28, 2011
    Last edited by a moderator: Sep 7, 2017
    Now lift the tps up and off of the throttle body. I wiggled it a little bit to get it to come off. The little green o-ring is the resistance you feel when you first start to remove it. Other than that and the two screws nothing else holding it down.
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  17. ernie

    ernie Two Time F1 World Champ
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    #17 ernie, Nov 28, 2011
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  18. ernie

    ernie Two Time F1 World Champ
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    #18 ernie, Nov 28, 2011
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  19. ernie

    ernie Two Time F1 World Champ
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    #19 ernie, Nov 28, 2011
    Last edited by a moderator: Sep 7, 2017
    The other thing I did was VERY slowly and gently removed the gasket from the back of the throttle body. I also removed the throttle bodies after I had driven the car. I wanted the engine warm so that the gaskets were a bit soft. I didn't want them hard and sticking to the plenum.

    Anyway I gently pealed them up with my nail, little bit by little bit, all the way around, until I got it all the way off in one piece.
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  20. ernie

    ernie Two Time F1 World Champ
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    #20 ernie, Nov 28, 2011
    Last edited by a moderator: Sep 7, 2017
  21. ghardt

    ghardt Formula 3

    Apr 18, 2004
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    Are you going to continue this thread after you get the TBs bored out?
     
  22. ernie

    ernie Two Time F1 World Champ
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    I might.

    Or maybe I should start another thread with a link to this one in it.
     
  23. PAP 348

    PAP 348 Moderator
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    Cheers mate, very well done as usual. :)
     
  24. ernie

    ernie Two Time F1 World Champ
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    Thanks Pap.
     
  25. vvassallo

    vvassallo F1 Veteran

    Aug 4, 2006
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    A very clear set of pictures and instructions. I have done this more than a few times so it all seems so elementary to me, but I remember when I was standing over my car, screw driver in hand having never touched a Ferrari engine before and you guys were urging me to just dive right in. And now I am getting ready do to my own major. I love this group!
     

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