Page 2 of 2 FirstFirst 12
Results 16 to 17 of 17

Thread: Futura throttle hesitation, hanging idle

  1. #16
    apriliaforum expert RAS's Avatar
    Join Date
    Aug 2003
    PA USA
    I can see the TPS mechanically/electrically changing over time requiring a reset to zero, but the ECU is flash memory and that doesn't learn on its own. I don't know a lot about computers (I'm a Mac guy, what do I need to know, lol), but when a file on a thumb drive becomes unreadable or the drive dies altogether, they don't come back on their own.

    I've had this problem pop up over the years as well. Many times, just shutting off the motor and restarting cures it at least temporarily and that's likely the IAC misbehaving for whatever reason. But if that didn't work, there was always something mechanical - like a leaking hose somewhere or the throttle plates sticking inside the TBs.

    My original 02 map has never seen a computer hook-up and 99% of the time, the thing still runs great..

  2. #17
    apriliaforum expert spesnaz's Avatar
    Join Date
    Mar 2014
    Quote Originally Posted by RAS View Post
    I don't think the ECU will learn anything - on its own w/o telling it thru Tune ECU or other software.

    My bike has done this a couple times over the 16 years I've owned it and it was always something mechanical that could be fixed by cleaning, lubing or changing out tubing.

    Make sure the throttle plates are closing completely - clean the bores of any gum that's built up around the throat of the TBs where they seat.

    Lube the throttle cables and clean/lightly lube the return spring assembly at the front of the throttle body assembly

    Has anyone ever messed with the throttle stop screw on this bike? It's really something that should not be touched.

    Have you tested the one way poppet valves in the vacuum lines?
    Hello RAS! Been in orbit this past year, essentially buried in work. Yes, I have tinkered with the throttle stop on this machine. The purpose of the throttle stop is to protect the butterfly valves in all designs that employ auxiliary idle air control. When the throttle is snapped shut, this prevents the butterflies from interference with the bore.

    In normal operation, a wee bit of carbon on the butterflies is the only interference you'll deal with, a continuously renewed buffer of sorts. With the throttle bore and butterfly cleaned, the setscrew is adjusted to the point where it makes contact instead of the butterfly.


Page 2 of 2 FirstFirst 12

Similar Threads

  1. New Throttle Bodies high idle...
    By martinking in forum RSV1000 Mille, Mille R, and Mille SP (1998-2003)
    Replies: 19
    Last Post: 09-07-2008, 07:21 PM
  2. Throttle Hesitation
    By rayracer in forum ETV1000 CapoNord (2001-2007)
    Replies: 7
    Last Post: 07-23-2008, 09:53 AM
  3. Throttle hesitation/surge started!
    By khewett in forum RSV Tuono, Tuono R, Tuono Racing, and Tuono Factory (2002-2005)
    Replies: 29
    Last Post: 04-03-2007, 03:15 AM
  4. Low Throttle Hesitation
    By CapoGrandad in forum ETV1000 CapoNord (2001-2007)
    Replies: 20
    Last Post: 06-25-2006, 08:44 AM
  5. 2002 mille r throttle hesitation 1 sec, then zoom
    By ryan_1000r in forum RSV1000 Mille, Mille R, and Mille SP (1998-2003)
    Replies: 7
    Last Post: 06-13-2006, 08:59 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts