Engine Management light

"skippy" <steverob1969.TakeThisOut@aol.com> wrote in message
news:1158079811.143233.48630@p79g2000cwp.googlegroups.com...
I have an x reg spacestar 1.8 gdi auto which has a little problem
> ...according to the garage the code means that the car is over fueling on
braking...

I have no direct experience with the diesels, but here's my $0.02.

The CODE indicates this is the case, and its probably true. "Over fueling"
AFAIK means that too much fuel is getting into the engine. There are
however other reasons than an expensive fuel pump that can cause this.

Fuel gets into the engine from the injectors, which are controlled by the
ECU, and they meter fuel from the fuel rail pressurised by the fuel pump.
Under braking the ECU SHOULD be switching off (or reducing) the injector
cycle.

I'd have the garage check the injectors for dirt and / or leakage, and give
them a good clean up. If one or more injectors is leaking despite being
turned off, there's the source of the over fueling.

Also verify the fuel pressure at the injector rail. Fuel pumps almost never
provide too much pressure, as failure modes are usually less or no pressure.

--
Stewart DIBBS
www.pixcl.com/lancerproject.htm
 >> Stay informed about: Engine Management light 

What Stewart mentions is called "coasting fuel cut" .

I don't know anything about the direct injection system (gdi) but in the
multi-EFI set up the injectors close on decelleration.

I'd look for a mechanic more familliar with GDI

From what I've pulled up on google, that is one crazy motor. the fuel pump
is computer controlled with pressures as high as 750psi, the injectors are
dual-mode and it will lean burn at 40:1!

http://www.designnews.com/article/CA109943.html





"Stewart DIBBS" <sjd.RemoveThis@pixcl.com> wrote in message
news:h6idnWUNpq9gz5rYnZ2dnUVZ_vednZ2d@magma.ca...
> "skippy" <steverob1969.RemoveThis@aol.com> wrote in message
> news:1158079811.143233.48630@p79g2000cwp.googlegroups.com...
> I have an x reg spacestar 1.8 gdi auto which has a little problem
>> ...according to the garage the code means that the car is over fueling on
> braking...
>
> I have no direct experience with the diesels, but here's my $0.02.
>
> The CODE indicates this is the case, and its probably true. "Over fueling"
> AFAIK means that too much fuel is getting into the engine. There are
> however other reasons than an expensive fuel pump that can cause this.
>
> Fuel gets into the engine from the injectors, which are controlled by the
> ECU, and they meter fuel from the fuel rail pressurised by the fuel pump.
> Under braking the ECU SHOULD be switching off (or reducing) the injector
> cycle.
>
> I'd have the garage check the injectors for dirt and / or leakage, and
> give them a good clean up. If one or more injectors is leaking despite
> being turned off, there's the source of the over fueling.
>
> Also verify the fuel pressure at the injector rail. Fuel pumps almost
> never provide too much pressure, as failure modes are usually less or no
> pressure.
>
> --
> Stewart DIBBS
> www.pixcl.com/lancerproject.htm
>
>
>
>
>
 >> Stay informed about: Engine Management light