Hello,

i am sorry.

with the air screw on the under side of the throttle body.
yes the throttle is in the closed position
iscv is working als cleaned the valve and test it with running without the plug on it and the plug it in. Then the idle whil jump up and come down.
yes i’m using the correct map sensor for the chip.
yes it was happy with 4,5% (in the begin it was like 5.2% but then it would fault plugs like no problem) co but then it was running at 1100 rpm.
then for mot i got it to 3.8% with more air and so rising the idle to 1250. (In the netherlands we have to achief less then 4,5% co)
after changing to the stage 2 chip the co got down to 1.4% after settinf the co screw. Also i can get it higher than 1.4% and closer to 0%.
i have turnt it over with the plugs in the cabels an it fired just light blue.
mainly the fuel pressure is on 3.5 bar with vacum of and 3 with it on.
yes i have checked the regulator and doesnt leak true.
also have changed it out for a other good one of a good running car.
I would visit the bigturbo forum again.

greetz