250ce running rich

Hi Lauris,

Christian found where your ignition moduel is located: It is underneath your battery:

Hi,

regarding your idle-run problems. On your pictures I see that the banjo bolt on the intake manifold is open with a hose closed by a screw. That might well create false air and varying rpm.

Hi, injector no. is 0 280 150 035. Idle-rpm is stable high when engine is warm, f.eks but if I remove one vaccum hose, so it gets even higher. That hose with the screw on goes to rear seats, so I closed it and checked, because rear seat realease button doesnt work. rpm are really high, so it has to be a major issue in vaccum system then. When engine head was off, so I went over gaskets and changed most of them or made new liqued gaskets for intake. And I refitted all of the clamps and fasteners. It has to be in order I think. When I checked engine vacuum on one of the hoses, so it measures good enaugh I think. I attached picture. But I would like start with the right MAP sensor and need to check AAV as well. I was bit short of time because in Easter arrived w123 230ce at home, which is a side project for the moment.

Lauris

Hi Lars,

MAP sensor is here. Please check your AAV. I have both 0 280 100 006 and 0 280 100 025. I recommend to use 0 280 100 025, but both are valid for 250 CE. Unscrew micro filter and check on warm engine whether it sucks in air there.

Ok, that's good news! Are you interested to exchange it with mine or want to sell it? I did vacuum tested it and it holds vacuum good. I have dissambled some parts right now, so it is not quite drivable, but I can see if I can get it to warm up tomorrow and get ckecked that AAV.

Lauris

Hi Lauris,

you can have that MAP sensor. But please check AAV first.