OK, another day and another attempt to fix my alfa! I've done a continuity test and that is all fine, fitted a new brake light switch - made no difference, cleaned the connectors on the engine ecu - made no difference. Still getting all these fault codes come up just with a turn of the key (don't even have to switch the engine on - EBD, ABS, VDC and now a glow plug error has joined the party). on the ecumultiscan the brake pedal pressure was moving around a but was always 291.something, my foot being on the brake didn't seem to make a difference - does this sound normal? We disconnected the suspected faulty brake fluid pressure sensor that is attached to the ABS pump and re-ran the ecumultiscan and it made no difference to the error codes, so it seems to be pointing to the sensor not working.....any thoughts anyone??!!
Paulalfagt - I will PM you re the loan of the valve if the offer is still open? Thanks.....
Yes, I will post it tonight/tomorrow for you. Please be sure to return it though, my other half paid for it and I'll be in the dog house with her if you don't. If it fixes your problem we can come to some arrangement over it.
I'm a bit concerned about your EBD fault, I never had that! And as far as I know it is something to do with an electronic version of the brake bias valve, but I could be wrong. Are you saying your reading 291.* bar of pressure? That's way too high. I will go plug in my laptop in a minute and see what mine says.
Glow plug is no problem, but you'll need a deep reach 9mm socket to get it out, I guess that's the least of you problems right now.
One other thing you could test, when you unplug the connector from the ABS ECU(battery disconnected), you can unclip the back cover and just check all looks in order.
You need to make sure you have the correct pump ECU part number. It's found on the white label on the underside of the ABS ECU. Sometimes there is an additional sticker on the top of the pump too. You can read the number on the underside of the ABS ECU fitted to the car with a well placed mirror and a torch, it takes some patience but can be done.