Air temp sensor, same general pattern. But I can't see it being that.

right cool, cheers peeps, i'll quit it with the amateur questions (for now lol)

why siphon the petrol? i found the easiest way to drain the tank is to undo the jubilee clip that holds the filler tube to the tank (or if its rusted and wont come off/rounded off head as i had, just cut it off with a hack saw) use an old kitchen bowl to catch the fuel and replace the jubilee clip

well its done now anyway

Well it passed this time, Emission results below

Fast Idle Test:
Engine Speed: 2500 – 3000 rpm
CO: max 0.300% - result: 0.033% - PASS
HC: max 200ppm - result: 17ppm - PASS
Lambda: 0.97–1.03 - result: 1.011 - PASS

Natural Idle Test:
Engine Speed: 450 - 1500 rpm
CO: max 0.500% - result 0.000% - PASS


So we will have a new member in the cento section later on. He is picking it up this evening.

Would you mind unveiling what you did to it to make it pass (apart from a good thrashing beforehand)? I am guessing lambda was replaced? Something else?

Basically your bang on.. I swapped the lambda from my seiT which i know works (will replace with a wideband). I checked all the management sensors worked correctly with a multimeter and stuck a new air filter on it. And damn good thrashing 20 or so miles on way to test station.

I also got the nice man to do emissions as soon as i arrived while the CAT was nice and hot.