Technical Immobiliser or fuel pump issues

[walkerpaul1]

Hiya

Can anyone help with my Coupe 20v turbo not starting?
It fires up with as can of quick start, but the injectors or the fuel pump don't seem to be working. I've pressed the pump reset button and both the injector dash light and the yellow code light are coming on and going out before cranking.
Does anyone know if the immobiliser switches off the pump as well as the injectors?

 

[Mike1alike]

Wouldn't the immo, if not giving ok, keep the light on the dash on?
Can you connect a diagnose to read the stored errors? Then you will know a little bit more.
For what you described I say a discharged battery can do that. So reading the voltage would tell if that's the case.

 

[bugsymike]

Wouldn't the immo, if not giving ok, keep the light on the dash on?
Can you connect a diagnose to read the stored errors? Then you will know a little bit more.
For what you described I say a discharged battery can do that. So reading the voltage would tell if that's the case.

As @Mike1alike says re immobiliser side and reading error codes etc.
Apart from that I would check electric fuel pump, fuses relays etc.
When you first turn ignition on , can you hear the electric pump work and then stop when pressure has built up?
If safe to do so after cranking a bit then switching off is there a pressure relief like a tyre valve on the fuel injection rail, it would tell you if fuel pressure was there.

 

[walkerpaul1]

Cheers Guys
I've checked the pump fuse and it's ok, not sure about the relay or the yellow connector yet, but the pump doesn't prime and there's no voltage at the pump end so I was wondering if the immobiliser can switch the pump off or if it's a separate issue?

 

[bugsymike]

Cheers Guys
I've checked the pump fuse and it's ok, not sure about the relay or the yellow connector yet, but the pump doesn't prime and there's no voltage at the pump end so I was wondering if the immobiliser can switch the pump off or if it's a separate issue?

I would say a separate issue if your immobiliser light comes on and then goes off like normal.
If you know which is the fuel pump relay in fuse box, you could try bridging the two main contacts using a fusible link for safety.
I had a 06 Fiat Grande Punto 1.3 MJ some years ago that wasn't getting power to the trigger side of the relay, so by doing this test it got it running and I was then able to trace the cause to a rotted wire at the ECU.