Lambda fault

[mark90]

Hi guys I have a clip 182 and she's running rather rich plugged it in comes up with lambda number 1 so changed that one and the second one but the car sometimes hesitates under acceleration but if left the car running rich it's fine and drives fine just rich any one have any ideas?

Cheers

 

[da rok]

could be an air leak on the manifold somewhere, recently fixed a leak on my map sensor which was letting the pressure reading go up a few psi fooling the computer into thinking it was under higher load thus richening the mix... since you have a obd reader... what are your map readings for a few different rpms?