Odd… throttle got stuck! | FerrariChat

Odd… throttle got stuck!

Discussion in 'Boxers/TR/M' started by bpu699, Sep 6, 2021.

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  1. bpu699

    bpu699 F1 World Champ
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    Dec 9, 2003
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    bo
    Car gets driven 3-4x a year… 18,000 miles on it…

    Turned it on, let it warm up for a bit. Pulled out of the garage, onto the driveway…

    Throttle felt “stiff” suddenly… odd…

    Blipped the throttle in neutral ready to shift into first… went to to 5000 rpm and stayed there!

    crap! Shut the car off…

    throttle pedal was very stiff, you press it down takes several seconds to rebound. Not stuck on carpeting…

    in the engine bay, manipulated the throttle pull… also stiff…felt like in molasses….

    wtf?

    car off, pressed the throttle 10-15x quickly to loosen it up. Helped a bit. Shot wd40 onto the throttle pedal, and on all the throttle linkages I could find in the engine bay…

    back to normal…

    what the hell happened? Garaged, climate controlled, dehumidifier in place…

    not convinced the wd40 fixed it, might of just “spontaneously” corrected…

    anyone ever have something similar? I certainly don’t want it occurring while driving…
     
  2. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
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    you may take a helper and then disconnect the trottle cable at the engine. one then push the pedal and the other keep the trottle cable and move this back and forth. then you can see where it will stuck
     
  3. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
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  4. bpu699

    bpu699 F1 World Champ
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    Thanks… just odd that the cable got tight “all of a sudden.”

    will try to squirt some lube into the cable, but right now it works flawlessly…
     
  5. fatbillybob

    fatbillybob Two Time F1 World Champ
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    Aug 10, 2002
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    Bo that issue not a surprise. There are lots of places to hold up. Seen this problem solved by cleaning and lubricating. Happens on many ferrari models
     
  6. JohnMH

    JohnMH Formula 3

    Jan 28, 2004
    1,625
    Dubai / Bologna
    Be careful. The original throttle cable frayed inside the sheath in my 78 BB512 a few years back. Decided to stick open in traffic, which was interesting. Certainly check for binding, etc., but if this is a recent development and you have not done any work around the cable recently, I would consider replacing it.
     
    NYC Fred likes this.
  7. bpu699

    bpu699 F1 World Champ
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    Does the testarossa have a rev limiter?
     
  8. turbo-joe

    turbo-joe F1 Veteran

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  9. qwazipsycho

    qwazipsycho Formula 3

    Oct 30, 2004
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    Romano, are you sure?? I don't think so. When I had a seatbelt recall done, the F tech didn't know what he was doing. He reinstalled the piece under the dash that is right next to the throttle wrong and when I took off from the dealershit the pedal stuck on that piece and I saw my tach bury the needle before I could grab the key. No rev limiter. That was the last time any other moron worked on my car.
     
    lagunacc likes this.
  10. turbo-joe

    turbo-joe F1 Veteran

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    scott, I think so - yes
    on my competition there was inside the original igintion system and the limiter often was working .
    how many rpm you had before you grab the key and how long it took until you stoped the engine? may be you have been so much surprised that you not recognized?
     
  11. pshoejberg

    pshoejberg Formula 3
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    I just replaced my speeder cable in my boxer precautionary with a Maranello Approved aftermarket cable. Unfortunately It didn't appear to be same quality as the original but the fit was acceptable. I considered to lube the cable before installation but decided not to and now I'm in doubt; What does the experts recommend, should I force some Teflon enriched oil into the cable sleeve?

    Best, Peter
     
  12. turbo-joe

    turbo-joe F1 Veteran

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    I would not do this. dust comes in and then the cable get blocked. best to use is gun oil
     
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  13. Drew Altemara

    Drew Altemara Formula 3

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    I would also check that the carb butterflies are not binding.


    Sent from my iPhone using Tapatalk
     
  14. turbo-joe

    turbo-joe F1 Veteran

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    I think bo is talking about a testarossa, not a BB carburator ;)
     
  15. Drew Altemara

    Drew Altemara Formula 3

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    Ok - thanks. I did not pick that up from the conversation.
     
  16. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    But the concept of a mechanical issue still applies -- TR still have two "butterflies", and many adjustable spherical ball joints in the linkage that need periodic lubrication (that they never get). Would never hurt to have a look under the airbox while an assistant operates the acc pedal from idle to WOT to see if something is wrongly hanging up/rubbing; however, a popped strand in the acc cable would be the worst cause.
     
  17. turbo-joe

    turbo-joe F1 Veteran

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    you are right steve with the 2 butterflies but those are much stronger than those in the carbs and until now I never had one bended
     
  18. qwazipsycho

    qwazipsycho Formula 3

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    I watched the tach peg before I got to the key. If there's a limiter, it's set to about 10k!
     
  19. turbo-joe

    turbo-joe F1 Veteran

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    that will never be possible, 10.000 rpm?
    in neutral I never tried the limiter, only when driving
     
  20. qwazipsycho

    qwazipsycho Formula 3

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    Well go out and start your car. Then stand on the throttle and hold it there. Watch the tach smack the stopper.
     
  21. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    I've never seen any mention of an electronic rev limiter in the F TR documentation, but there are at least three different Microplex ignition ECUs used on TR -- MED120A, MED120B, and MED120B/D -- so don't know if they could be different for this issue.
     
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  22. Natkingcolebasket69

    Natkingcolebasket69 F1 World Champ

    My first one didn’t have one:


    Sent from my iPhone using Tapatalk
     
  23. qwazipsycho

    qwazipsycho Formula 3

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    Hey, the AMAZING thing is it didn't blow up! It says a hell of a lot about that motor. I have no idea how fast it ended up but that tach literally smacked the stopper. It sits at 9500 RPM...so...
     
  24. rpissm

    rpissm Formula 3

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    Sounds like there's a limiter on this one:
     
  25. turbo-joe

    turbo-joe F1 Veteran

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    yes, clearly to hear the limiter
     

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