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

[Ron Wainwright]

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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> 



       
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