Horrible running 8v

[jdbubb at ix.netcom.com (Dan Bubb)]

Very good George!
This is all good, but before starting this procedure check and make sure the frequency valve is
buzzing.
The frequency valve is on the back of the CIS metering unit. Round solenoid thing with a two pin
electrical connector and two fuel lines attached.
If this valve stops working it increases the pressure in the "lower chambers" and makes the engine
go very lean.
Just listen and make sure it's buzzing.
Dan

----- Original Message -----
From: "Scourge" <scourge@cogeco.ca>
To: "Rocco list" <scirocco-l@scirocco.org>; "Jason Peters" <nefarious@drumatix.net>
Sent: Thursday, August 26, 2004 11:37 PM
Subject: Re: Horrible running 8v


> Hey, welcome to the list!
> My guess would be that the car is running too lean. So when you unplug the
> O2 sensor, the car defaults and runs super rich(in your case that's just
> enough fuel for it to run properly).
> The fix *should* be an easy one.
> Run the car long enough to get it up to a normal operating temp. Then check
> out your throttle body, there's a little switch on the top that will be
> actuated when the throttle is fully open.......Push It(hahah name the
> movie!!). If the idle improves there is a good chance the rest of this will
> help. On your fuel distributor(big thing on the drivers side with the
> airboot and fuel lines) in between the intake boot and the fuel lines, there
> is a small hole* just grab a LONG 3mm allen key and stick it in. Turn it
> clockwise and it will richen the mixture(more fuel) counter clockwise will
> lean it out(less fuel). With the car idling play around with it a bit. You
> shouldn't need to turn it more then a half or three quarter turn. Once you
> get the car to idle a bit better play around with that and the idle
> screw(back of the throttle body, 7mm socket or wrench) to get a good
> balance.
> After all of this, if you notice bad fuel mileage, lean it out a bit. If the
> oil temp increases significantly richen it a bit, you're too lean.
> I recommend having a shop with a sniffer tune the car at some point so you
> have a base line to go from. Playing with it in your driveway is kind of
> trial and error.
> *if there is no hole, there will be a small plug you may have to drill out,
> mine have all had the hole by the time I got them
>
> Good Luck and HTH
>     -George
> Check it out I answered a tech question!!!!!! Now pat me on the back and
> tell me what I screwed up. lol
>
>
> ----- Original Message -----
> From: "Jason Peters" <nefarious@drumatix.net>
> To: <scirocco-l@scirocco.org>
> Sent: Thursday, August 26, 2004 8:53 PM
> Subject: Horrible running 8v
>
>
> > Hello everybody,
> >
> >   I'm pretty new to the 'rocco list so excuse me if this is an easy
> > question/fix.  First a little background:
> > '83 'rocco
> > 8v on CIS
> >
> > Okay, so the PO disconnected the O2 sensor because the car wouldn't run
> > properly with it connected.  So I assumed it was a bad O2 sensor.  I know
> I
> > should never assume anything with these cars and I should have guessed
> that
> > a faulty O2 sensor would be too easy.  Anyway, I replaced the O2 sensor
> with
> > a nice new one, connected it and fired it up.  Seemed to run fine for the
> > first few minutes(maybe till the sensor warmed up) after that the idle
> > started to hunt around up and down.  Backed out of the drive way and the
> car
> > would barely go.  It sputtered and stumbled almost to the point of
> stalling.
> > Nursed it back to the driveway, unplugged the sensore and it started
> running
> > fine again although the idle does seem high (1100rpms).  I'm a complete
> CIS
> > noobie so any and all help is appreciated.
> >
> > Thanks,
> > Jason
> >
> >
> > _______________________________________________
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>
>
>
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