Today's findings -
Was soot coming from exhaust. Changed needle from AAA to AAU to lean out mixture, car then started ok then it decided to blow out white smoke instead, no smell of oil thankfully.
Turns out that the cheap eBay head gasket has failed between cylinders two and three, water was shooting out of spark plug holes. Combination of over rich fueling and water resulting in wet black sooty emissions from exhaust.
It doesn't end there though .. compression test gave poor readings of 115 on both cylinders one and four. No point checking two and three obviously.
So head is coming off checking valve stems and lapping them in then new head gasket. Then check compression again. I suspect that ring dealing isn't great and I'll end up just getting the car fifteen miles back home and just using for very short local trips.
I'm not going to spend time stripping an 850. Frankly I've had it with the a series, already placed a wanted ad on 16V mini forum for complete Micra conversion and prepared to sit and wait for the right one to appear.
Thanks everyone for your help much appreciated
Edited by ads7, 07 January 2019 - 04:50 PM.