View Single Post
  #3  
Old January 3rd 07, 05:07 AM posted to alt.autos.audi
dave AKA vwdoc1
external usenet poster
 
Posts: 951
Default Audi 4000s fuel problem - wont start

Like TonyJ said..............it might be a Failing engine coolant temp
sensor (CTS)

Or a fuse in the fuse box. It is positioned to look like a spare fuse and
many times I will find it missing on a vehicle that is not running right if
running at all. 8^o
Examine all of the fuses for any broken ones and stick a fuse in all sockets
with terminals.

Or it could be the ground wire for the fuel pressure regulator is broken and
it should be located at the cold start valve.

Or it could be a defective fuel distributor.

Or it could be a massive air leak at the large intake manifold boots. Maybe
a light engine backfire into the intake system along with the gas pedal
being depressed might have caused a hose/pipe to pop off creating a large
vacuum leak.

Or it could be the ign switch not allowing power to the systems when it is
in the ON position. Telltale signs would be those red idiot lights not
being ON with the ign ON or while cranking over the engine.

good luck and let us know what happens!
later,
dave
AKA vwdoc1

"TonyJ" > wrote in message
...
>
>
> 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.



Ads