Thanks Smaky in the right hand picture it actually shows the elusive valve as #10. In all the info I have or have been able to find on the web it only shows the pipe above & always as #8.
I'm going to have to check virtually everything around my engine bay and fuel system I think. It appears that the garage I bought it off left much more than the plastic rocker cover top loose when they couldn't get the car going properly. I'm getting it better every time I find something and fix it but I really didn't anticipate how much time it would consume, think I might have bitten off something that's going to chew me.
It nows runs perfectly for the couple of miles before the ECU decides the engine is fully warm but then has an awful jerky jump when throttling right off and lunges when touching the throttle again no matter how gently, it still occasionally sticks at 2000RPM and then slowly drops to 1100RPM after about 20-30 seconds. I can't get it to idle at 850 RPM when warm even after half a dozen ECU resets and umpteen tickover resets. At least it's down from the 2500RPM idle when I bought it and much more driveable now though.
If you've got any ideas from experience they would be gratefully received, I've done hours and hours of reading up on it and the areas I've identified to work through are:
Did they fit the correct new Lambda-need the Bosch number to compare
Is the new crank sensor seated correctly
Possible fault in the vapour system purge valve or solenoid valve
Possible fault in the inlet manifold rocker vacuum actuator system
Incorrect reading at low air speeds from MAF
Possible corrupted ECU map or ECU affected by incorrect info re: TC/ESC, air con, speed sensor (new by them too) or 1 of the above sensors.
I think I'll stop worrying about the oil consumption for now as I got hold of a handbook and it says they are designed to use 1 litre per 1000KM, find that hard to believe but it's there in black & white.
One thing I can't work out is if I follow the other half's 146 (hers also a 1.8 but an ally topped PH1) both cars show the same speed give or take 1-2 MPH but mine will record 10% less miles??? At all other RPM other than around tickover my engine is now far smoother and pokier than hers although hers always does around 80 miles on £10 of petrol to my cars indicated 55 miles when driving really steadily, so after 4 weekends working on it this glitching problem and lack of economy is now really doing my head in.
I had no idea Alfa offered traction control on the 146 either, I was originally looking for a 156 until we bought Donna's 146 and the interior space, hatchback boot and nimble handling swayed me. There were several 146s for sale with it when I was looking, all were late 1.8 PH2s with ESC too and every extra fitted like mine, maybe Alfa needed a clear out with a new model coming? I have since seen a couple of 2.0 ti 146s advertised with traction control.
Alfa 146 traction control - Web search - Virgin Media
It appears to be linked to the ABS with a slightly different warning light on the dash to cars without it. I haven't looked into how the Electronic Stability Control works, I'm sure it's nothing high tech like electronically controlled shock valves though it does work, no matter how hard I corner there is 0 body roll, it takes a bit of getting used to, you can't flick the car in to a really tight bend to upset the back end out then power through while winding off the touch of opposite lock-the car will only go where the steering points it. I've had to unlearn a lot of skid pan training and track day tips, driving it is a bit like going on the old Sega racing simulators.
if you're ever passing on your way South feel free to pop in and take it for a spin if you're curious about the differences it makes. I'm easy to find, just come off the A1 at Elton or Peterborough and the A509 takes you 1 road away from me on the way to either M1 Jctn 13 or 14 or the A6 to Bedford. I'm literally right between Northants Alfa & the Santa Pod Drag Racing Track.
sorry about the length of the post