Emissions failure, big time

[Marc Kitchen Sr]

So took the wifes ZR for a test today and all went well except for the emissions. The exhaust doesn't look too old but the emissions were through the roof so it looks like I'm going to be fitting a new cat and probably a new sensor too just to be on the safe side. The exhaust fumes were a bit smelly so I'm hoping it's just the under the car cat I need to replace. Time will tell.

[ritchy]

What aspect of the emisions did it fail?

[Marc Kitchen Sr]

It failed on all aspects. CO 4.93% (0.3 max) HC 420 (200 max) Lambda 0.85 (0.95-1.09) on normal tick over CO 3.71 (0.5 max) so a new under cat and lambda sensor are on the shopping list I think. Fortunately as I've been using the same place for over 20 years they will check it for me when I've done it and if it's under then it will pass and if it's over then I can still take it back later for a free re-test. Only failed on emissions and a bulb so can't complain really.

[petrol-head16v]

Defo cat gone then way to high..... you only have 10 (working days) for a free re-test

[JOHNDQ]

It failed on all aspects. CO 4.93% (0.3 max) HC 420 (200 max) Lambda 0.85 (0.95-1.09) on normal tick over CO 3.71 (0.5 max) so a new under cat and lambda sensor are on the shopping list I think. Fortunately as I've been using the same place for over 20 years they will check it for me when I've done it and if it's under then it will pass and if it's over then I can still take it back later for a free re-test. Only failed on emissions and a bulb so can't complain really.

If its running over 1% it will be more than the Cat

[ritchy]

Cat and oxygen sensor is a good start to see whats what.

[Happax]

Yeah I agree that engine is pumping in way more fuel than it can handle, or there's some serious air flow issues, either way I'm finding it hard to see why the EML is not on.

[Marc Kitchen Sr]

Yeah I agree that engine is pumping in way more fuel than it can handle, or there's some serious air flow issues, either way I'm finding it hard to see why the EML is not on.

EML is on.

[Marc Kitchen Sr]

Cat and oxygen sensor is a good start to see whats what.

Ordered both cat and sensor, then taking it back to see if it's worked.

[Happax]

What sort of fault codes are you getting from the ECU then?