Hello guys, sorry for my bad english. I have a problem with my Fabia 1 1.4 16v 75hp bky , when i put the contact  the fuel pump relay make a strange noise. I tried to replace the relay  the noise is still there and the car wont start. 

 

16 minutes ago, Cristianstefan said:

 

 

Edited 12 December, 20178 yr by Cristianstefan

Maybe the battery needs replacing, also check the earth strap where it connects to the front suspension turret, It needs undoing, wire brushing to clean up and reconnect.

 

DB.

Battery dead, too cold, too flat.

The battery its ok..like 1 year old ( varta). i didnt try to start the engine, just contacting to have lights , air conditioner....

See what happens if you do try to start it.

If it is voltage-related, and the car will start, the relay may well stop chattering once the alternator brings the voltage up.

1 hour ago, Cristianstefan said:

The battery its ok..like 1 year old ( varta). i didnt try to start the engine, just contacting to have lights , air conditioner....

 

A one-year old battery can still be flat, it just needs charging instead of changing. I didn't say you needed a new one.

If i try to start the engine doesn t work. When i turn the key the engine rotates. If i  cut out the fuel pump , the relay stops the  clicking noise . I think is a short at the fuel pump...because when the relay  clicking  the pump doesnt work. ( i dont hear it)

Do you hear the fuel pump run for a few seconds when you open the driver's door?

 

Before relay clicking yes.. after no... the relay comand its from ecu with ground, in service take ground directly from battery to comand thr relay...( the relay stops clicking , i hear the pump sound... but the car still wont start)

Interesting. As you may know, there are two relays which can operate the fuel pump. Fuel supply relay (position 9 on relay panel) is triggered by the door opening, via the onboard  supply control unit earthing one side of its coil. Fuel pump relay (position 4 on the relay panel) is triggered by the engine ECU earthing one side of its coil.

For the fuel supply relay to be working OK with the pump, I think that means the pump is not the problem?

@Cristianstefan Which relay have you changed?

Edited 13 December, 20178 yr by Wino

 I replace the relay 447 

Was that in the top row or middle row of the relay holder, I think maybe you changed the wrong one.

I replace the noisy one...  i dont know where it was.

 

Edited 13 December, 20178 yr by Cristianstefan

 

My mechanic declared himself defeated!!hahaha,is not my laugh.