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Old January 2nd 07, 09:55 AM posted to alt.autos.audi
TonyJ
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Posts: 80
Default Audi 4000s fuel problem - wont start



wrote:
> I was wondering of anyone could help me with a problem that suddenly
> developed with my AUDI,
>
> The car is a 1987 Audi 4000s 1.8L
> Here is the deal, the car will start for second or two, but will not
> rev up, then it dies.
>
> Fuel pump and filters are new.
>
> Strong fuel pressure to the Fuel injector unit.
>
> The injector unit is sending fuel to the cold start valve, but not to
> the cylinders, thus the car will start but will not continue to run.
> The pressure to the cold start valve is strong, but not a drop to the
> fuel injectors.
>
> I replaced the external fuel regulator with a spare one and checked for
> vacuum leaks etc.
>
> I am not sure where to look from here, internally on the Fuel Injection
> Unit, or to a relay or other control.
>
> As I stated the problem happened overnight.
>
> Any help would be appreciated.
> I have not used a internet group before, do I hope I am doing this
> right...........
>
>
>
>
>
> Thanks,
>
>
>
> Richy Jackson
>

If the air plate just above the air filter is stuck the injectors will not fire.
This can be due to vacuum leaks (you checked but check again) or deposits on
the rod above the plate.

Open air cleaner and reach up into the intake just above. The plate should move
but with a little pressure. Don't force it.

Other ideas:
Differential fuel pressure sensor (just in front of fuel distributor.

Blown engine management fuse (in the side of the relay box.

Failing engine temp sensor. In the T44s it is called the MFTS and it is located
by the upper radiator hose inlet to the engine.
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