We (i.e. my Dad) found a cheap replacement fuel pressure sender on ebay and fitted that. It was a GM part with a different Bosch PN but off what is effectively the same engine. Fitting that cut down on the amount of smoke under hard acceleration but also affected performance - it felt slightly down on power.
It did, however give a more realistic mpg figure of around 55mpg rather than 68mpg.
Thinking, that perhaps this might be a promising solution we (my Dad) sourced and fitted the right part. And it went back to trailing a thick smog behind the tailgate... For about 20 miles. It seems that it's adjusted itself and whilst it isn't great, smoke output is back to where it was with the GM sender. Performance is improved though.
It's also back to the unrealistic 60+mpg...:roll eyes: It's got half a tank shown on the fuel gauge and it's showing a range of around 500 miles... Yeah. Right.
We (my Dad) also replaced the thermostat. It's still very slow to get up to temp compared with the GTA though. I think the temp sender is faulty? The new sender that came with the stat is the wrong one though (4 v's 3 pins). Next part I guess.
We (my Dad) has also sourced a bi-zenon projector lens conversion kit from eBay. I had a long argument with someone on here (their now banned) about the merits of the cheap projector lenses v's the expensive ones from retrofit source. At the time I'd ended up with the retrofit source ones but the cheap ones my Dad has sourced for the 156 are EXACTLY the fecking same bar some minor extraneous mounting bolts. They were about £15 quid each IIRC. Well worth it even if they come in LHD configuration to begin with.... Then again so did the retrofit source ones. :roll eyes:
So that's coming too, it needs them. The standard filament headlights are like having cataracts.
I'll post some pics soon. I've got no excuse now really. Arm / wrist is better than it was and I've sadly been OK'd by the lovely physio therapist I was going to.