Emissions for MOT

[doctorjohn]

Advice to a new owner please re reducing 'high' CO2 emissions:

Recently acquired WRX 2.0 turbo (320bhp) failed MOT due to high CO2 readings. MOT tester (decent bloke) looked underneath and said there seemed to be a shortfall in the cat department and this was the likely reason. Any inexpensive fixes on this one?

[Scoobyghost]

You could try to borrow a cat if you can find one. I still have my cat stored up just in case. Or you could find a friendly mot tester [emoji12]

[doctorjohn]

Good thought, thanks, I suppose a second-hand cat would be a risk?

[Scoobyghost]

It is a risk. If you were local I'd let you borrow mine.

A second hand cat may just be up for sale because they owner decatted and be fully working. Anything second hand is risky.

[Jimmymac101]

just be thankful you dont own a VW haha 

 

On a serious note .... when was the last time it had a decent service inc spark plugs - dizzy - ht leads - oil - oil filter - air filter ? worth doing that as every little helps

 

being that its 320bhp im asuming its mapped ? it could be a mapping issue maybe 

 

James 

[doctorjohn]

Seems VW have found the way round the high emissions problem James, maybe I could borrow the offending part!

Good point about having the basic service items all in good nick - unfortunately they all are, so no scope for any benefit there. Yep, it's mapped and quite a flier so I'm reluctant to meddle with the mapping. Maybe a high flow sports cat (= wallet pain of course) would resolve it with minimum affect on performance?

[Scoobyghost]

It would need to be mapped to cater for the sports cat.

[stants]

My sports cat failed 1st time as not hot enough, however that was on jap map and was over fueling which wouldn't of helped