What FADECS's are the 1800's running? The 'Regal' FADEC?

And what sort of problems were you experiencing?

Hopefully, you've twitched all you 'high current' cables together, and run the RPM sensor as far away from them as possible - a tip that Smithy gave me, and made all the difference.

Oh - and don't short the glowplug lead positive terminal to Earth by pushing the boot on too hard - that tends to fry the FADECS so I have been warned...

BJ