[urq] Was engine stumbling

[Thatcher Hubbard]

The freq. valve is the black one right next to the fuel distributor
right?  I call it "the buzzer".  Now that my exhaust leaks are fixed
and my valves adjusted, I can actually hear that thing inside the car.

I put a new O2 sensor in the car when I did the head work.  In
general, the car idles much better than it did before (~850 rpm when
warm, it was never over 750 before).  It has more power and better
throttle response as well.

I'm hoping that I just have a few sensors that are old and failing. 
If the ECU is starting to go, it's 034efi time.


On Tue, 7 Dec 2004 07:46:23 -0800, urq <urq at pacbell.net> wrote:
> ... this may be the driver for the OXS Freq Valve not working all the time
> ... or perhaps something with the OXS ... you might want to monitor the
> voltage on the OXS when this is happening.  If the OXS doesn't react until
> after the event I'd suspect the driver in the ECU.
> 
> Cheers!
> Steve B
> San Jose, CA (USA)
> 
> >  The interesting thing is this:  After the car is warm, it will idle
> > with the duty cycle where I set it.  But somewhat periodically, the
> > idle will jump up about 100rpm and the duty cycle will go to 99.2%
> > (I'm guessing it's full open the multi-meter just isn't reading it
> > right).  Also, closing the WOT switch doesn't seem to have any affect
> > on the idle speed (I've read that it should).
> 
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