[V8] Audi V8 - we build excitment! (Woes of V8 ownership)

[Ed Kellock]

First, I don't think anybody's found a $1k sensor on these things yet, but
that doesn't mean it's not hidden somewhere.  ;-)

2nd, I think the knock sensors will only cause timing retardation, not
mixture adjustments.

And C, I was thinking temp sensor 1st but OXS, sure, that could be it.

Does anyone know default value the ECU will use if you unplug the temp
sensor?  Gotta be somewhere in the middle, I'd guess.  Recently beat a v8
5spd back to life which would flood horribly.  Thought about unplugging the
temp sensor about the time it finally sputtered kicked, then roared to life,
spewing heinous spent gasses at the tail pipes.

Has anyone tried unplugging the temp sensor when battling a flooded engine
in one of these?

Ed
Colorado Springs


On 5/10/06, Ingo Rautenberg <i.rautenberg at waratap.com> wrote:
>
> Carter,
>
> Hmm.  Methinks it's a OXS sensor problem (or related wiring).  The
> resistance values tell the computer to dump more fuel (had it with the
> 5-speed), but if the wiring has been cut or somehow compromised, the correct
> values will never be obtained.  Instead, you'll be washing the cylinder
> bores with fuel, fumigating the cars behind you, and emptying your
> wallet.  I'd disconnect the signal (black) wire from the OXS and see what
> happens.  Then I'd check fro compromised wiring and repair/replace oxs
> sensor.  If that doesn't do it, it could well be the  temp sensor below the
> pass side distributor (but that should give a code).
>
> HTH
>
> Ingo
> ----- Original Message -----
> From: Carter Johnson
> To: Ingo Rautenberg ; v8 at audifans.com
> Sent: Wednesday, May 10, 2006 4:46 PM
> Subject: Audi V8 - we build excitment! (Woes of V8 ownership)
>
>
> Ah Ingo, how right you are.
>
> So, my latest (3000 mile) problem:
>
> I'm driving along, I smell raw, unburned or partially burned fuel,
> immediately check engine light comes on, and milage drops to ~14 mpg at
> best.  Driving is uneffected, from what I can tell.  This comes and goes,
> but in the last 3000, it's mostly been there.
>
> Any thoughts?
>
> My guess: Engine thinks it is running lean (knock sensor malfunctioning?)
> and dumps fuel into the motor.
>
> This coincided with the changeover to Ethonol "summer gas", interestingly,
> and at the same time my cousin's S4 started running rather poorly (perhaps
> unrelated, but it wouldn't surprise me if the gas was to blame).
>
> At 3+ a pop for a gallon, it would be nice to be back around 21mpg, but
> not if it's a 1,000$ sensor.
>
>
> Carter
>
> Ingo Rautenberg <i.rautenberg at waratap.com> wrote:
>    As Mike Arman would say, "Not just a car, its an ADVENTURE!"
>
>    ;-)
>
>    ----- Original Message -----
>    From: "Carter Johnson"
>    To:
>    Sent: Wednesday, May 10, 2006 4:22 PM
>    Subject: [V8] shiftlock
>
>
>    > This JUST started happening in my car, as well - also a 93. Hmmmm.
>    Disconcening the first time it happened, for sure!
>    > Carter
>    >
>    >
>    > Message: 8
>    > Date: Wed, 10 May 2006 14:32:55 -0400
>    > From: Ingo Rautenberg
>    > Subject: Re: [V8] ShiftLock problem..
>    > To: ur32vquattro
>    > Cc: v8 at audifans.com, Scott Baumann / PTS Power
>    > Message-ID: <9DEDD3CA-AACE-4126-A1BA-C7DC45FFAC39 at waratap.com>
>    > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>    >
>    > Which reminds me. On the '93, it seems half the time when I move the
>    > shifter to park, I find that the key won't release and then the
>    > reason: The shifter does not pop up at the end. Quick lift on the
>    > knob and the ignition is unlocked.
>    >
>    > Ingo
>    >
>    >
>    >
>    >
>    > W. Carter Johnson
>    > SileStone/Counterfitt of RI
>    > 401-789-3217 home
>    >
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>
>
>
> W. Carter Johnson
> SileStone/Counterfitt of RI
> 401-789-3217 home
>
>
>
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