[s-cars] 1993 S4 - need some help

[Emre Washburn]

Before my MAF went bad, my car was known to shoot flames on a high rpm
shift. Huge flames. I'd say I was running a "bit" rich ;-)


-- 
Emre
92 //S4
90 Cq
40 valves to many!


On Tue, 7 Dec 2004 09:40:37 -0500, Evan Levine <evan.levine at gmail.com> wrote:
> I already changed the O2 sensor... and we checked the FPR very
> carefully. I have not tried a known good MAF - that is a good idea.
> 
> The cleaned sensors were pretty much anything under the hood we could
> find readily. The one he thought made the difference was the head temp
> sensor.
> 
> On Tue, 7 Dec 2004 09:18:52 -0500, Mark Strangways
> 
> 
> <strangconst at rogers.com> wrote:
> > One thing that can provide for rich running conditions is a stuck open
> > thermostat.
> > It never really lets the engine get to that temperature that it wants to
> > see.
> > I found that it does affect mileage drastically, and will cause that rich
> > condition.
> >
> > The other item that come to mind is the FPR, they can fail or the rubber
> > hose that goes to the top of it can (and does) become very dry.  Mine is
> > loose, and should be replaced.
> > If yours is very loose or off then the vacuum at cruising will not be there.
> >
> > What sensors did he (the mechanic) clean ?
> >
> > Mark
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Evan Levine" <evan.levine at gmail.com>
> > To: "S-CAR at audifans.com" <s-car-list at audifans.com>
> > Sent: Tuesday, December 07, 2004 9:04 AM
> > Subject: [s-cars] 1993 S4 - need some help
> >
> > > Long time reader.... not often poster, usually stick to AW. But I'm
> > > having a long standing problem that no one seems to be able to help me
> > > with... so I'm turning this one to the experts.
> > >
> > > 1993 UrS4 - Pastore chip, samco hoses, constant torque clamps - yada
> > > yada other mods that don't really work into this equation. There is no
> > > boost leak.
> > >
> > > Car keeps running rich, I can see it on my A/F gauge and in my fuel
> > > milage, also the black nasties that come out the pipe when I get on
> > > it.
> > >
> > > This was diagnosed for months by me to no solution, and finally my
> > > mechanic tried cleaning some sensors, and magically it went away...
> > > for about 2 weeks. Now it's back. Do I need to clean these sensors
> > > better? Was it just luck and the weather or something is why I thought
> > > it was fixed for 2 weeks? If the sensor needs constant "cleaning" is
> > > that an indicator that it is bad and should just be replaced?
> > >
> > > Any input on why it's running rich would be greatly appreciated.
> > >
> > > Evan
> > > _______________________________________________
> > > S-CAR-List mailing list
> > > S-CAR-List at audifans.com
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> > >
> >
> >
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