Car failed NCT on emissions

Philip424

Put my 1997 1.2 corsa through the nct earlier and it failed on emissions , here are the readings

Low idle CO 0.60 vol% above 0.5% fail

High Idle CO 0.85 vol% above 0.3% fail

Lambda was 1.00
Engine Temp was 100 C


So i was just wondering if Dipetane would work for lowering the CO , considering on high idle it is nearly 3 times too high.

Interslice

Fully service recently including plugs and air filter? Is it sluggish or misfiring or running badly in general.

rufio777

couldnt see dipetane being enough, id say its a new cat you'll need.

Philip424

Yeah recently just got a full service , and it is very sluggish at times . If I put my foot down the car chugs for a few seconds before driving as it should . It also smells very strongly of petrol . There was a japspeed backbox and cat on the car when i bought it last year , these looked quite new at the time so im not sure a new cat would help here . Thanks for the reply's.

Interslice

Get the car checked over by a mechanic about the sluggishness. Sounds like your coil pack/ignition or a sensor is gone. Worth doing anyway as your fuel economy will be suffering and won't be helping your high CO due to running rich air fuel ratio. A japseed cat on a corsa, must have been for d'turbo:P.Get an genuine opel exhaust/cat from a scrap yard.

Ask your self is it worth fixing. Try and get a price for the work to be done first.

Philip424

Cheers thanks a million.