5k freq valve

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <3.0.5.32.19980825185417.0096d6f0@mail> Arryn Milne writes:

> 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.

Run the diagnostics documented on Scott Mockry's ECU page at
http://www.teleport.com/~scottno/ecuf.html

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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