hi everyone I am struggling a bit with this one
it starts ok but starts to misfire at 1600rpm
and also starts to blue smoke this it does while driving or in the workshop if I hold the revs at 1600rpm. I have checked for air bubbles and replaced the fuel filter checked the egr and a lot of other things and just by chance I found out the it runs well with the air mas meter disconnected no misfiring and no smoking. so out comes the scope. the idle signal was 2.36v and max. 3.84v 2 years ago I had taken a sample of this ams and it was idle 1.96v and max. 3.84 could this difference cause it to overfuel does anybody have any data for this ams? it's a siemens and the ecu is lucas dcn2 also used in the old Peugeot expert