[QUOTE=autozen]Bigblueone,
What did your mechanic to set the lower chamber pressure to .4 below primary pressure?

Autozen
Not sure what you are asking here?

Because the intention of the first visit was to slightly richen the mixture and the results were so negative (i.e my previously strong cold start went AWOL) this time their goal was to confirm the factory spec setting of .4 bar.

They did this with pressure guages and the time to have the car through cold and warm starts although I am told that because of the very fine setting of .4 bar either you have to have highly calibrated guages or err slightly to just over .4 bar which they did.