I was told to post in here guys...

The usual alternator problem? - BRISKODA - The Skoda Forums

Was wondering if any of you know if the ECU or any of the ign components are *that* sensitive that a high voltage spike would kill them ?

This is all on an R plate Felicia 1.3

The last one of these i came across at work had boiled the battery and cooked the engine ecu. Replaced both and the alternator and car was ok

it's not a simple surge, it's giving the thing a power supply of well above the expected operating range of the ECU electronics.

Usually causes a short in the engine ECU that keeps blowing the supply fuse.

so if the ecu is dead I need a new one, but does the ecu get tied in with the emobiliser?

so if the ecu is dead I need a new one, but does the ecu get tied in with the emobiliser?

Yes, or at least probably. The instrument panel and engine ECU have to be coded together.

I think I'm right in saying that if you bought a set of instruments, keys (for the RFID chip), and engine ECU from a car they would all be coded OK. Otherwise you need a dealer computer or VAG-COM.

As a first step, check the ECU fuse since Lummox suggests this often blows. Then find someone to scan the car (with the alternator disconnected!) and see if the engine ECU responds. If the fuse keeps going or it doesn't respond, then your ECU is screwed.

Don't think the instrument cluster is coded into the ECU on the felly. Think its just the immobiliser that is coded to the ECU as I have replaced my instryment cluster without having to have it recoded.

Where abouts are you Jimgreen? Might be worth seeing if someone is nearby with vagcom to give you a scan!

phil