[s-cars] Turbo resetting, lost boost...

[chris chambers]

Code 2224 can also be thrown when the ECU "thinks" its in an overboost
situation, caused by a defective MAF or dirty/corroded connections on
the MAF and MAF cable.

BTDT, feels like you drove into a brickwall, sort of a bucking feeling.

If it is just "losing" boost I would recommend checking the water trap
on the firewall. Even though mine was all connectted it is evidently
loose or has a crack because in COLD weather I go out and just lose
boost...no drivability problems other than no boost.


HTH
Chris

 
--- Paul  Gailus <gailus at mindspring.com> wrote:

> You should also check if any codes are being thrown.
> If you get the 2224  blink code (or a 00544 DTC from
> VAG 1551, VAG-Com, etc.) then this would confirm the
> likelihood of a leaking boost hose or a popped-off hose to the
> ECU pressure sensor.
> 
> This particular code can be stored if the ECU determines
> that there's more air flow at the MAF than can possibly
> be generated at the measured manifold pressure and
> engine RPM. In other words, the measured pressure at
> the ECU is below what it should be under these conditions.
> Hence, the pressure sensor could be defective or disconnected,
> and there's a risk that the actual manifold pressure could be
> much higher than what's being indicated.
> Or, if the problem is due to a leak after the turbo, then the turbo
> could overspin. Another way this code could be thrown is if
> the manifold pressure is really exceeding limits because of a faulty
> wastegate or other problem.
> In any case, when the ECU detects this problem,  then the engine
> initially cuts the fuel and then limits the boost to prevent possible
> damage. So sometimes lost boost can be a good thing ;-)
> 
> Paul
> 
> ----- Original Message -----
> From: <Djdawson2 at aol.com>
> To: <jjmcvay at juno.com>; <s-car-list at audifans.com>
> Sent: Wednesday, January 19, 2005 5:38 PM
> Subject: Re: [s-cars] Turbo resetting, lost boost...
> 
> 
> > In a message dated 1/19/2005 4:35:06 PM Mountain Standard Time,
> > jjmcvay at juno.com writes:
> >
> > > Anybody had a similar experience/advice?  The car goes to the
> mechanic
> > > today or tomorrow.  Is it a pipe collapsing with the new boost? 
> Seems
> like the
> > > computer resets the engine to drive with low boost?  I drove it
> with
> crazy
> > > boost maybe 5 times since installing upgrades Dec. 22nd without a
> hitch.
> > >
> >
> > First thing I'd check are the lines running in and out of the
> little
> moisture
> > collector on the firewall... behind the plastic cover.  Sounds like
> the
> ECU
> > is missing the boost signal.
> > HTH,
> > Dave
> > _______________________________________________
> > S-CAR-List mailing list
> > S-CAR-List at audifans.com
> > http://www.audifans.com/mailman/listinfo/s-car-list
> 
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