First i want to say Heloo to everyone!!

I have a problem with my A8.
One morning way to work the car would´nt start.After little searching i figured out that it was the fuelpump.
I ordered i new and installed it and a new fuelfilter.Tried to start but still nothing happend.I pulled out the pipe from the fuelfilter
to see if there was coming any gas,but nothing!!
I have tried to spray some startgas in the engine and it starts emidietly.
My problem now is that there are not coming any gas to the engine even after changing the fuelpump and filter.
Do you guys have any Idea what to do??I think the problem maybe is some thing with the electronics???????Maybe anyrelay???


The car is Audi A8 4.2 1997

 

Double check to see if you have spark while cranking, if thats ok pull off the fuel line to the engine and put it in a water bottle. Then turn the key to the on position and see if it starts to fill up with gas. If it doesn't then you need to test for voltage at the fuel pump. If you don't a multimeter, you need to either buy one or take it to a mechanic.

 

There is Spark.When i spray starterspray(startgas) in to the airfilter hoose the car starts but not without it.
I will test the voltage tomorrow or so.If the voltage is bad,what is the reason then,relay?

 

Most likely a relay or fuse yes.

 

Then i hope that it is just a fuse that is badBut it could not happen with my luck

 

I have not tested the voltage on the pump yet but i changed the Realy to the Fuelpump today and nothing happend,not starting.
Tried to spray Starterspray in to the Airintake again and it starts wothout any problems.
All the fuses are Ok.

Have to check the voltage on the pump,or do something else?

 

I would still check power at the pump, and have the fault codes checked.

 

1 question.Is there 2 fuelpump on A8 4.2??? I changed the pump inside tank.Is there any else??????

 

Just one fuel pump, and three fuel senders for the gauge.

 

I have now fixed so the fuel comes to the engine but it still dont start??I took the fuelline off near engine and checked.
Any another thing i have missed maybe???