"new toy" is a bit iffy about cold starting: fires easy enough but drops back to below idle speed and stalls when stone cold.
once it's run for a bit to get warm (not up to running temp) it idles OK, although return-to-idle still drops below idle revs for a few seconds and then comes back up.
It's also slightly rough at certain rev/load conditions, most obvious is pulling off with not much boot. Not as smooth as I'd expect. better when it's up to temp, and it seems to pull OK if you give it some welly.
It is of course a 2-cat one, being a '95/96 model - so I'm not fully au fait with how the system works. I presume that initially, the system uses some default values until the lambda sensors are up to temp and working?
I'm thinking it might be mixture.
Any thoughts? I'll be looking at the plugs and likely replace them unless they look very good, and I'll alos fire it up in the dark and look for arcing in the leads, although they look quite good 8mm silicone ones, they're not original. ditto air cleaner element.
It's been standing quite a while, apparently - they got new motors a bit back and kept the discos as spares for several months - so it was MOTed in march and has done about 7 miles since. This may or may not be relevant - and it may settle down with a bit of use.
Other than that, it may have a slight appetite for coolant (need to monitor it), but then my 3.9 does that too, and so does the TD5 - I suspect a minor leak in each case, not enough to show as actual drips, which is just evaporating. Apparently, it had a gearbox replaced at about 75K miles, with a genuine dealer replacement no less. which is nice.