Technical Failed MOT emissions

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Technical Failed MOT emissions

So my cinq failed its emissions (1242 8v).. Results below.

Engine temperature 83.0°C

Fast Idle Test:
Engine Speed: 2450 – 2950 rpm - not checked
CO: max 0.300% 1.441 FAIL
HC: max 20ppm 60 PASS
Lambda: 0.97 – 1.03 0.979 PASS

Second Fast Idle Test:
Engine Speed: 2450 – 2950 rpm - not checked
CO: max 0.300% 2.515 FAIL
HC: max 20ppm 100 PASS
Lambda: 0.97 – 1.03 0.941 FAIL

Natural Idle Test:
Engine Speed: 750 - 950 rpm - not checked
CO: max 0.500% 0.404 PASS

Now, not really sure what to do about this other than give the car a good thrash on the way there. Oil & filter are good, air filter is clean, exhaust is ok. Car runs perfect. Thought i would turn down fuel pressure but then thought thats not gonna do anything is it on an injection car? I was thinking if i restrict the amount of air getting through the air filter would that result in ecu chucking in less fuel and thus bringing it down a tad.

Car has quite old petrol in it (with some injector cleaner in it), would that effect the emissions at all?

I just noticed that its down on the test sheet as 1108 not a 1242, would the limits be any different?

Got til Wednesday to sort it - chuck me some opinions.

edit: car has been sat for approx 3 years, i did do about 10 miles thrash on way to MOT.

Didnt mean to like this then soz, when your at the mot station waiting to have it done, keep the revs up as a warmer cat will perform better. When you arrived did you leave the engine off for a while untill the test was done? Also get some carb cleaner give that a blast in the throttle body and the air temp sensor, or you can buy cataclean for it the cat is caked up with carbon.
 
sensor is on edge of manifold close to thermostat housing
best way check on computer what's up with lambda/coolant sensor/etc.
 
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