Cheers, my fan comes on when my gauge is around the half way mark and its running rich so I'll give that a go.

Which one is the coolant temp sensor for the ECU?

Yes its running very well again and back in daily use. The company that sent me the first faulty ECU then the exchange one said the ECU's can fail if the battery is left to go flat but I've had this car for a very long time and never heard that before and don't know if anyone else has.

When mine did the same it was an ECU fault.

Just to finish this post off, I didn't break this in the end. I walked away and left it for awhile then as in my other post it was an ECU fault and the first replacement ECU was also faulty. So with a second new ECU it is running well again, mot'd and back on the road so I can enjoy driving it again.

Mot passed today so all taxed and back on the road again.

Fixed at last it was an ECU fault. My original one had failed then the recon replacement I got only started the car once which I was then looking for other faults. Anyway I returned the ECU to the supplier and when I got back from my holidays the replacement was here. plugged it in and car starts fi...

Just a quick up date on this so you know where I'm at with it. I've had a few pm's back and forwards with gsi220turbo and checked lots out today again so thanks Paul I do appreciate the help. Anyway to save me typing it all out again here is a copy of the email I've just sent back to Paul. Hi Paul, ...

As above, still messing on with my 214 sli and its looking like the fault could be in this box, nothing else left to try. I know years ago you could get a harness that plugged into these but the company I got one off years ago is no longer trading. Can anyone suggest a company that can test and repa...

Fault still there, car fired up straight away on Monday night and ran fine, went to move it tonight and give it a quick run around the block to make sure it was still ok ready for mot tomorrow and once again it won't start. Now breaking, I'll list it on ebay as breaking and in the for sale section, ...