[Topcat Tomcat]

Oh dear. It's failed its MOT, both on the CO emissions and a hole in the sill next to the rear offside jacking point.

[Paul_1978_yorks]

Oh dear. It's failed its MOT, both on the CO emissions and a hole in the sill next to the rear offside jacking point.

Shouldn’t be too much trouble to sort?

[Topcat Tomcat]

[/quote]

Shouldn’t be too much trouble to sort?
[/quote]

Hopefully not. The mechanic thinks a new CAT is required for the CO. I'm wondering if it might be a good idea to sort the slightly deformed sill at the same time.

I will have to think about it.

[Topcat Tomcat]

Incidentally, you can see the deformation in the offside sill in one of the photos.

[220 GSi turbo]

Being a 1990 car, it doesn't actually need a cat. (Compulsory from 1992/K-reg onwards from what I can remember). You could either fit a decat pipe section in its place or buy a non-cat centre exhaust section.

Obviously check all of the 'usual' stuff too, such as plugs and leads, thermostat and air filter. And dare I say an 'Italian tune-up'??! (Make sure it has a decent cambelt, though!)

[Topcat Tomcat]

Thanks for that. Would not removing the CAT not make things worse?

All belts have been changed to 'reset' the clock!

[Mr Teddy Bear]

There are a number of differences between the cat/non cat D16 single cam engines, engine breathing system, fuel tank breather and I would expect a different ECU? The non cat engines produce about 113 BHP, with a cat 109 I think.

Has the exhaust down pipe got a cat sensor in it? it might have been modified by a previous owner is what I'm getting at. If not as has been suggested just remove the cat.

That is a beautiful shade of Blue looks like mine, it changes as the light changes, not as blue to the naked eye as the digital camera has made it look?

[220 GSi turbo]

Removing the cat should not affect the running of the car in an adverse way. I had a new 216 Coupe in 1993 and I fitted a non-cat exhaust centre section to it straight away: there were never any problems with the way the car ran and no warning lights came on. I refitted the cat after 2 years and 50,000 miles before the car was sold on.

I have also done a little research and discovered that a car registered before 1/8/1992 should not have to pass the 'cat' emissions test even if a cat is fitted. It will be subjected to exactly the same test as any other petrol car registered between 1975 and 1992.

https://assets.publishing.service.gov.u ... dition.pdf

What CO and Hydrocarbons results did your car produce?

[Topcat Tomcat]

That is a beautiful shade of Blue looks like mine, it changes as the light changes, not as blue to the naked eye as the digital camera has made it look?

I must admit that I do like the colour. A lovely finish as well. Virtually no 'orange peel' visible either, in total contrast to many contemporary vehicles!

As always, plenty to think about when we get back from Scotland! Thanks everyone.

[Topcat Tomcat]

What CO and Hydrocarbons results did your car produce?

Sorry, I forgot again!

Fast Idle Test -

CO - O.726
HC - 28
Lambda - 1.000

Second Fast Idle Test -

CO - O.898
HC - 23
Lambda - 1.017

Do the above figures suggest a specific problem to anyone?