MOT Certificates?

burns · 12 Oct 2006 at 15:24

That little sticker thingy on the bottom left of the MOT certificate, presumabley that is supposed to be stuck to the windscreen or something? I've just got my first one of these new certificates so I'm also slightly unsure.

Phil W · 12 Oct 2006 at 15:24

And is it true that the engine would perform better on the emissions test if warm/hot than if you got in and drove it from cold straight to the test station?

Liverpool-Lad · 12 Oct 2006 at 15:44

burns said:
That little sticker thingy on the bottom left of the MOT certificate, presumabley that is supposed to be stuck to the windscreen or something? I've just got my first one of these new certificates so I'm also slightly unsure.

Thats purely for a reminder, not compulsory.

probedb · 12 Oct 2006 at 15:57

Phil W said:
And is it true that the engine would perform better on the emissions test if warm/hot than if you got in and drove it from cold straight to the test station?

Yes, I believe the cat will work better when up to temperature.

silversurfer · 12 Oct 2006 at 16:18

PPM Parts per million

So a big v8 3 million bits of gas with 1 million bits that kill stuff

little 4 cylinder 1 million bits of gas with 333,333 bits that kill stuff

The v8 is bad but they both have the same efficency. If you were paying car tax then they might care about how much quanity of bad stuff your car shoves out.

Old cars have a less strict test this was before cats came in, its round about K reg 1993. The new test sometimes gives this test to newer (90's) cars Ive heard.

Do they not give the weight anymore, I'd be interested how much my (modded) car weighs

Nozzer · 12 Oct 2006 at 17:22

My de-catted car passed an emissions test last week :cool:

MNuTz · 12 Oct 2006 at 17:25

its all done on a % of the total emissions of the engine, not the actual volume of gases.

My 3 cars are all pre-1991 so can go without a CAt fitted and have a higher fail rate than the newer cars (although one has a emissions rate of over 10% when it should be under 4% :eek:

)

New lamba probe me thinks!!

silversurfer said:
Do they not give the weight anymore, I'd be interested how much my (modded) car weighs

Yell.com your post code and local weigh bridge. Some do it for free others can charge but should tell you the weight of your car, however, the weigh bridge i used to operate went up in 20KG increments

Lopéz · 12 Oct 2006 at 17:59

Phil W said:
And is it true that the engine would perform better on the emissions test if warm/hot than if you got in and drove it from cold straight to the test station?

Yes, cats often needd a good screwing before they become active.

MNuTz · 12 Oct 2006 at 18:41

Lopéz said:
cats often needd a good screwing before they become active.

that could so easily be taken the wrong way!

*goes to phone the RSPCA

The_Dark_Side · 12 Oct 2006 at 18:46

dangerousmouse said:
they check the ppm for certain gasses that are in the exhaust fumes. there is a set threshold limit for this, so it is the same for every vehicle.

there's a limit for Diesels and a different limit again for Turbo Diesels.

not the same.