causes for a non-functioning FV???(4ktq)

[David Head]

How about approaching it from the other end - yer O2 sensor and temp sensors
input the control...

Marc A Swanson wrote:

> Alright, I'm completely stumped on this one.  As some of you may know from
> the post I sent to the list a few days ago, the frequency valve in my 4ktq
> is not working.  I'd be estatic if it was just a bad valve, but it
> isn't.  During the output tests when the FV is supposed to be cycled at
> 50% duty cycle I get 0%.  The wire that is supposed to be hot all the time
> is, so aparantly the problem lies in the switched ground wire that the ECU
> uses to control it.  There is continuity in that wire and it has close to
> the spec'd 9.6 Ohms of resistance from the ECU to the FV.  I even tried
> swapping out ECUs and that didn't fix the problem either.  There is a good
> solid ground at the IM (which I'm assuming is the main point where the ECU
> gets its ground) verified by near 0 resistance from a known good ground to
> that point at at the pin on the ECU.  So what gives??!!  What can cause
> the FV not to function?
>
> Thanks!
>
> -Marc-
>
> /* +++++++++++++++++++++++++++++++++++++
> +Marc Swanson                          +
> +                                      +
> +http://marcswanson.ne.mediaone.net    +
> +                                      +
> +87 4kcs(t???)q  itching for a drive   +
> +85 4ksq  "the spare"                  +
> +87 5ktq   donor (Parting out)         +
> +++++++++++++++++++++++++++++++++++++ */
>
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