Got a problem with my gasses! HELP

[buffalino]

got a problem with my gasses!
In my mot today my gasses from my exhaust were to high, im thinking it could be the ecu,, would it be down to anything else? can someone enlighten me please ,
the lambda is new as well and the dme is tryed and tested
ok i done two mots one with the oxygen sensor connected (the first readings)
and the second reading disconnected!

Co relenti 0,65% CO Accel;0,79% LAMBDA 1,089,,

and disconnected
Co relenti 0,18% Co accel 0,61 and lambda 1,029

[jlevie]

The DME is a possibility, but the higher probability would be intake leaks (that a smoke test would find) or a fuel system or dirty injector problem.

[buffalino]

ok , i not sure how to do the smoke test, can you explain please,

[jlevie]

A smoke test isn't difficult. You plug the exhaust, replace the AFM with plug containing a nipple for smoke injection, connect the smoke machine, and pump in oil smoke. There are no leaks if a smoke pressure of 2-4psi can be held for at least five minute. The only difficult part of this is getting your hands on the machine. Since the cost of a low end machine is in the $1000 range it isn't really DIY. Have a shop do it.