[Diy_efi] Pulsing a K-jet cold start injector?

[Ernest Buckler]

Jeff,
Any chance you've converted one of these Audis to full EFI?  The CIS is OK when it works, but crazy when some little problem makes it act up.   I'm ready to convert my '89 200!
Ernie
  ----- Original Message ----- 
  From: jeff matthews 
  To: diy_efi at diy-efi.org 
  Sent: Tuesday, January 31, 2006 6:51 PM
  Subject: Re: [Diy_efi] Pulsing a K-jet cold start injector?


  Thanks, didn't realize that...

  Kinda funny too cause in my driveway is 3 Audis, 2 87's and a 89, (all 5KQT's)






  Best regards, 
  JEFF 

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    From:  Torbj?rn Forsman <torbjorn.forsman at gengas.nu>
    Reply-To:  diy_efi at diy-efi.org
    To:  diy_efi at diy-efi.org
    Subject:  Re: [Diy_efi] Pulsing a K-jet cold start injector?
    Date:  Tue, 31 Jan 2006 20:07:43 +0100
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    In fact, there are some factory applications where the cold start injector of a K-jetronic or KE-jetronic system is pulsed. For example, some of Audi's turbocharged 5-cylinder engines from the mid 80's. There, the cold start injector is pulsed during hot starts in order to avoid the risk of starting problems due to a vapor lock somewhere in the fuel metering arrangement.

    Anyway, i don't think the long-term reliability of a such injector in pulsed mode would be a problem. Probably, the interior parts are identical to a normal Bosch injector.

    Best regards

    Torbj?rn Forsman

    jeff matthews wrote:
    >NO, But I did use it connected to a 12V adjustable boost switch, and 
    >adjusted boost up accordingly :)  [as an extra injector]
    >
    >
    >
    >
    >Best regards,
    >JEFF
    >
    >     
    >------------------------------------------------------------------------
    >     From:  /"Tomas J. Sokorai Sch." <tsokorai at xperts.cl>/
    >     Reply-To:  /diy_efi at diy-efi.org/
    >     To:  /diy_efi at diy-efi.org/
    >     Subject:  /[Diy_efi] Pulsing a K-jet cold start injector?/
    >     Date:  /Tue, 31 Jan 2006 09:24:54 -0300/
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    >Tue,
    >     31 Jan 2006 09:24:55 -0300 (CLST)/
    >     Has anyone tried to PWM the cold start injector of an old 
    >K-jetronic
    >     (CIS) FI?
    >     And if anyone has, how are the opening/closing times and any 
    >ideas
    >     about the
    >     durability in pulsation mode?
    >
    >     --
    >     Tomas J. Sokorai Sch.
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    >     Diy_efi at diy-efi.org
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