CIS Flowtech does it again - WUR | FerrariChat
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CIS Flowtech does it again - WUR

Discussion in '308/328' started by tiredtom, Sep 29, 2012.

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  1. tiredtom

    tiredtom Karting

    Feb 26, 2012
    85
    Monterey County, CA
    Full Name:
    86 328 GTS
    #1 tiredtom, Sep 29, 2012
    My 86 328 was unable to hold idle when warm. Larry Fletcher rebuilt the WUR, and the issue is completely resolved. One more thanks to him...
     
  2. mwr4440

    mwr4440 Five Time F1 World Champ
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    Mark W.R.
    #2 mwr4440, Sep 30, 2012
    YEP.

    Larry is one of the very best in FI on that side of the planet.
     
  3. Mike C

    Mike C F1 Veteran
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    Aug 3, 2002
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    Mike Charness
    #3 Mike C, Sep 30, 2012
    Without a doubt! He's been a great help with both advice, rebuilds and other hardware over the 20+ years I've had my 308.
     
  4. Todd308TR

    Todd308TR F1 World Champ

    Nov 25, 2010
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    #4 Todd308TR, Sep 30, 2012
    Awesome, now what is the WUR?
     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    30°30'40" N 97°35'41" W (Texas)
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    Steve Magnusson
    #5 Steve Magnusson, Sep 30, 2012
    He might be the ONLY one left ;) -- I know that some other advertisers of CIS rebuilding services actually just send the parts to Larry F..
     
  6. mwr4440

    mwr4440 Five Time F1 World Champ
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    Jun 8, 2007
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    Mark W.R.
    #6 mwr4440, Sep 30, 2012
    The physical act of rebuilding them (WURs & FDs) isn't really hard ONCE you obtain all the necessary parts (Good Luck). I've done it.

    Getting them absolutely spotless at the microscopic level that is required is an exercise in patience few would endure. One very tiny speck of rust or varnish (dried gas) will throw either of these parts into a tizzy.


    BUT, it is the magic employed after the fact to bring it into spec, that is truly the hard part and the piece of the pie I couldn't hope to do. That is where, IMHO, Larry earns every cent he charges.
     
  7. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    Steve Magnusson
    #7 Steve Magnusson, Sep 30, 2012
    +1 -- the investment in the tooling/equipment/skill to calibrate is a huge barrier, and one of the primary reasons why EFI replaced (mechanical) CIS -- no analog mechanical tweaks in EFI.
     
  8. smg2

    smg2 F1 World Champ
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    SMG
    #8 smg2, Sep 30, 2012
    When Bosch is sending the work to him, that's when you know it's being done right!
     
  9. Todd308TR

    Todd308TR F1 World Champ

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    #9 Todd308TR, Sep 30, 2012
    Wow, y'all can't even point me to a link?
     
  10. tiredtom

    tiredtom Karting

    Feb 26, 2012
    85
    Monterey County, CA
    Full Name:
    86 328 GTS
    #10 tiredtom, Sep 30, 2012
    WUR - as best I can represent it, is a device that controls the idle fuel pressure based on the time it takes for the 12V signal to the bi-metallic strip inside to push a plunger and, downstream, alter the pressure coming out of the FD. It also will soak up heat from the engine itself, so the bi-metallic strip/plunger is already in "warm" position if the car is starting warm.

    That explanation may be inaccurate in some specifics, but covers the basic function.
     
  11. tiredtom

    tiredtom Karting

    Feb 26, 2012
    85
    Monterey County, CA
    Full Name:
    86 328 GTS
    #11 tiredtom, Sep 30, 2012
    WUR - Warm Up Regulator
     
  12. chrisbinsb

    chrisbinsb F1 Rookie

    Oct 20, 2011
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    Santa Barbara
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    #12 chrisbinsb, Sep 30, 2012
    It's possible that the wur is responsible (or partially responsible) for an idling problem I've had. Is there any easy way to test how well it's functioning like I've read about for the AAV (sticking it in an oven and freezer and observing what it does) or is a pressure tester and more complicated procedures required?
     
  13. tiredtom

    tiredtom Karting

    Feb 26, 2012
    85
    Monterey County, CA
    Full Name:
    86 328 GTS
    #13 tiredtom, Sep 30, 2012
    I don't have a pressure tester, so had to use a process of elimination. If your car idles smoothly when cold, but won't idle smoothly when warm, the WUR could be stuck in the cold setting. That seems to have been my situation.
     
  14. Ferraridoc

    Ferraridoc F1 World Champ
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    Jun 20, 2012
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    Patrick
    #14 Ferraridoc, Sep 30, 2012
    Does a Euro (Aussie, actually) 308 have a WUR?
    I've got this damnable hot idle problem that's (a) intermittent, and (b) very embarrassing at a set of lights as I roll to a stop and the engine dies.

    Thanks

    Patrick
     
  15. The Kook Abides

    The Kook Abides F1 Rookie

    Jan 4, 2011
    3,459
    #15 The Kook Abides, May 23, 2013
    Last edited by a moderator: Sep 7, 2017

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