Z0 together with z700 control fuel shutoff at high vacuum but only when the * 
is off.   When the * is on the fuel shutoff is controlled by rpm (no fuel above 
1900 rpm).
Also check to make sure the clutch and neutral switches are working.  The "n" 
should show up when in neutral and also when the clutch pedal is pressed down 
while in gear.


  ----- Original Message ----- 
  From: Chuck 
  To: Ray Ayala 
  Cc: [email protected] ; [email protected] 
  Sent: Thursday, June 16, 2011 11:16 AM
  Subject: Re: diagnose bucking on Link'd 97


  Ray,
  When I'm coasting in gear with foot off the gas, the * does appear on the 
screen.
  I haven't adjusted Z0 yet, but I'll try it tonight.
  thanks!
  chuck

  On 6/15/2011 7:05 PM, Ray Ayala wrote: 
    Have you confirmed that the idle * is not coming on while this is 
happening?  (it shouldn't be).

    Have you played with Z0 ?  A typical setting would be about 3 less than you 
normal MAP at idle.


    ----- Original Message ----- 
      From: Chuck Wills 
      To: [email protected] ; [email protected] 
      Sent: Monday, June 13, 2011 6:52 PM
      Subject: Re: diagnose bucking on Link'd 97


      Thanks LGO,
      Fuel is spot on - and fuel values in the neighboring cells are similar to 
the ones involved in the bucking.  WBO2 shows 14.7 there and in the vicinity.
      The more I think about it, I'm starting to think it's got to be something 
with the fuel cut rather than general fuel settings.
      -Chuck


      On Mon, Jun 13, 2011 at 9:06 PM, <[email protected]> wrote:

        I'm not familiar with the Obiwan as I have the standard link for FMII, 
but if your Link has the capability to adjust the overall or main fuel setting 
(Man! I hate it when I can't remember the term!)  then I'd suggest dropping the 
value by 3 to 5 points.  You may be just a bit too rich at 1900 RPM.

          I've got a turbo'd 97 with Obiwan Link.  It's been a long time since 
I did any Link tuning, so I'm a bit rusty.
          This is not a new issue, just one that I'm finally getting around to 
dealing with.

          When coasting at slow speeds - parking lot speeds - there is a 
bucking at 1900rpm.  It's pretty significant in lower gears.

          The TPS appears to be adjusted correctly, there is the * in the 
keypad display when the throttle is closed.
          relevant ignition and fuel zones are set fairly close to each other.

          I'm guessing that 1900rpm is where the fuel gets turned back on to 
return to idle... and it happens abruptly enough, and there's enough driveline 
lash, that it ends up setting up a vicious circle with the bucking.

          What do you guys think? Any easy fix?






        -----Original Message-----
        From: Chuck Wills <[email protected]>
        To: [email protected]
        Sent: Mon, Jun 13, 2011 7:13 pm
        Subject: diagnose bucking on Link'd 97


        I've got a turbo'd 97 with Obiwan Link.  It's been a long time since I 
did any Link tuning, so I'm a bit rusty.
        This is not a new issue, just one that I'm finally getting around to 
dealing with.

        When coasting at slow speeds - parking lot speeds - there is a bucking 
at 1900rpm.  It's pretty significant in lower gears.

        The TPS appears to be adjusted correctly, there is the * in the keypad 
display when the throttle is closed.
        relevant ignition and fuel zones are set fairly close to each other.

        I'm guessing that 1900rpm is where the fuel gets turned back on to 
return to idle... and it happens abruptly enough, and there's enough driveline 
lash, that it ends up setting up a vicious circle with the bucking.

        What do you guys think? Any easy fix?

        -Chuck


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