car starts but cuts out immediately

[Chez]

electrical help/advice

This is a follow up to this thread

http://www.seatcupra.net/forums/showthread.php?t=284407&highlight=immobiliser

I'm now looking for ideas what to check now,

The car has had the immobiliser software removed and all faults removed from the ecu.
Another ecu had been used but the car still cuts out.
The ecu can be communicated with if the ignition is off but with ignition on it loses power which seems to be the problem.

Could it be a relay or earth problem?

Thanks for any replies.

 

[DPJ]

Keep it all in the same thread please. Merged

 

[Chez]

Right folks, another update-

The ecu was full of checksum errors and hopefully these have now been cleared/sorted.

An auto electrician has been checking the car and found the fault to be the "k wire", there was a resistor and part of the track burnt in the instrument cluster and causing it to short to earth.

The cluster has been repaired and getting sent back to the garage who are hopefull when plugged in will solve the problem and let the car fire up.

 

[rwright1985]

i had this on mine i think, does it only happen occasionally? mine kicked in, thought about it and died, all it needed was some wd40 spraying on the leads by the plugs, happened when it was damp and sometimes very cold!

 

[Chez]

SHE'S ALIVE!

Looks like the problem was the melted resistor behind the instrument cluster.

 

[kassim]

could be the following

alternator ?
starter motor ?
battery ?

 

[Chez]

No, the cars fixed.

I on the other hand need fixed as i got the bill today

At least she passed the mot today as it runs out on Feb 10th