[V8] [unclassified] Re: 1992 Audi V8 4.2 running lean

Thu Jul 19 19:21:00 EDT 2007

Not to just throw parts at the car, but ithe coolant temp sensor behind r/s head is a good place to start. I keep a spare on hand as this is a critical part. 

-dc-

--------------------------
David A. Coleman
BlackRock
Sent via BlackBerry Wireless

----- Original Message -----
From: v8-bounces at audifans.com <v8-bounces at audifans.com>
To: Ron Wainwright <ron_01056 at yahoo.com>
Cc: V8 at audifans.com <V8 at audifans.com>
Sent: Thu Jul 19 19:10:43 2007
Subject: Re: [V8] [unclassified] Re:  1992 Audi V8 4.2 running lean

Changed the MAF today. The car's still running lean, no different as to 
before.
I've also cleaned the ISV, it appears to be working just fine.
What's wrong with my car? :(

/Dag

----- Original Message ----- 
From: "Ron Wainwright" <ron_01056 at yahoo.com>
To: "Dag Bøsterud" <dag.boesterud at consulgranada.net>
Cc: <v8 at audifans.com>
Sent: Monday, July 09, 2007 4:11 AM
Subject: Re: [unclassified] Re: [V8] 1992 Audi V8 4.2 running lean

> procedure for checking is,
> Disconnect the harness at the MAF.
> Connect a LED tester to terminal 1 of harness
> connector & a positive cable connection....LED tester
> should light up. If it doesn't,
> locate & repair open circuit.
> Connect LED tester between terminal 5 of harness
> connector & ground.
> Switch ignition on....LED tester must light up.
> If not connect LED tester between terminal 5 of sensor
> harness connector & ground.
> Switch ign on & crank eng for a few seconds.
> LED tester must light up when ign is switched on &
> while cranking.
> If LED tester goes out during cranking do this....
> Verify that fuse 23 in good.
> check continuity between terminul 5 of sensor harness
> connector & fuse 23.
> Check continuity between fuse 23 & terminal 59 of
> fuel pump relay socket.
> All so says to check the control signal to the relay.
>
> But if you have a spair working MAF or fuel pump
> relay I'd say give them a shot.
>
> Ron
>
> --- Dag Bøsterud <dag.boesterud at consulgranada.net>
> wrote:
>
>> Come to think of it I personally feel that the idle
>> speed is a little low,
>> but a mate of mine - a real Audi-fan - says it's
>> okay.
>> We changed a couple of rubber hoses on top of the
>> inlet manifold when we
>> changed the transmission (the beast),
>> but there might be others hoses that started
>> leaking.
>>
>> If the MAF map is offset... what to do?
>>
>> /Dag
>>
>>
>> ----- Original Message ----- 
>> From: "Ron Wainwright" <ron_01056 at yahoo.com>
>> To: "Dag Bøsterud" <dag.boesterud at consulgranada.net>
>> Cc: <v8 at audifans.com>
>> Sent: Monday, July 09, 2007 3:22 AM
>> Subject: [unclassified] Re: [V8] 1992 Audi V8 4.2
>> running lean
>>
>>
>> > "Adaption Limit Exceeded" sounds like code 2231
>> Idle
>> > speed regulation.
>> > You eather have Maximum, or Minimum adaption
>> limit.
>> > Maximum will give you a low idle speed which could
>> be
>> > the ISV, a bad connection or the MAF map.
>> > Or
>> > Minimum will make your idle speed too high.
>> > Again....ISV could be binding when open, MAF map
>> > offset, additional air induced between the MAF &
>> ISV.
>> > In the later case I'd think you have a leak.
>> >
>> > Ron
>> >
>> > --- Dag Bøsterud <dag.boesterud at consulgranada.net>
>> > wrote:
>> >
>> >> I've had the transmission changed (automatic) on
>> my
>> >> 92 V8 4.2. Prior to this,
>> >> the engine had no fault-codes using VAG-Com.
>> >>
>> >> After the transmission was changed, VAG-Com
>> reports
>> >> fault code "Adaption Limit Exceeded".
>> >> At part throttle you can feel the car's running
>> >> lean; a look at the spark plugs confirm this.
>> >> At full throttle, the car is fine.
>> >>
>> >> The spark plugs are new (and correct), the oxygen
>> >> sensor are new and the fuel pressure regulator
>> are
>> >> new.
>> >> I also checked the air mass meter, it doesn't
>> appear
>> >> to be broken. I cleaned it with carburettor
>> cleaner.
>> >>
>> >> I also tried to disconnect the oxygen sensor; the
>> >> car then ran just fine.
>> >>
>> >> Does anyone have any idea of what could be
>> causing
>> >> this?
>> >>
>> >> /Dag Bøsterud
>> >>
>> >> Norway
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>> >
>> >
>> >
>> >
>> >
>>
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