Re: 5k freq valve

[Wallace White <wallace@remdesign.com>]

I've had a fairly loud clicking of late from that same vicinity,
accompanied by a miss when the engine is cold (it seems). Stethoscope
definitely not needed. What does that mean? TIA.

- Wallace
  '87 5kcstq 149k


Arryn Milne wrote:
> 
> Anyone know what this does or how to troubleshoot it?
> 
> On an '86 5kcsTQ, having what seems like a vacuum leak, but isn't.
> Eliminated that by plugging every vacuum line I can find.  Using a
> stethescope I used to hear humming from the Freq valve (few months ago),
> but it is silent now.  Putting the steth on top of the black plastic boot
> (from the fuel dist), I hear a humming sound (like I used to hear from the
> Freq valve), but can't hear it on anything metal.
> 
> Thanks for any help,
> Arryn.
> 
> PS: also sprayed carb cleaner along and around vacuum lines and there were
> no changes in rpm.

--

 Wallace White                             wallace@remdesign.com
 REM Design                                     tel 415.621.3922
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