[urq] URQ freq valve trigger

[Bill Bennett]

Dennis
 Check the duty cycle, the base CO adjustment is so far out of range when 
the O2 sensor turns on it is taking the adjustment to the limits of the ECM 
and frequency valve to either a rich or lean stop, hence the valve stops 
buzzing, someone has adjusted the CO prolly way too rich to make up for 
crappy running cold, contact me off list if you need more help, be sure to 
check the vacuum hoses going to the warm up regulator under the injector 
cooling fan first.
Bestus, Bill
----- Original Message ----- 
From: <DGraber460 at aol.com>
To: <urq at audifans.com>
Cc: <quattro at audifans.com>
Sent: Sunday, October 02, 2005 3:35 PM
Subject: [urq] URQ freq valve trigger


> My new to me black #472 URQ 10V K26 is puzzling me a bit. The Frequency
> valve will not work consistently. I just spent the last week removing and
> replacing the down pipe & 02 sensor but no change. The valve itself is not 
> the
> issue. If I plug other known good units into the wiring harness they don't 
> buzz
> either.
> Other than the 02 sensor and the ECU (BTW I'm using the one from my old 
> car
> that worked fine) what other items/sensors could be the culprits?
> If I unplug the 02, the valve buzzes and the car runs  crappy. Plugging 
> the
> 02 back in it shuts down again. The 02 I'm using  was the one from my old 
> car
> that ran great.
> TIA
>
> Dennis
> Denver
>
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