MOT fail

[dom]

if it smells of petrol then chances are its running rich, sort out this problem and it will hopefully sort out the emissions problem.

iirc redex isnt that good for mk4 golfs? so i would try to avoid using that.

how do i fix the running rich problem?

You need to diagnose the cause first. Have you scanned for fault codes?

[mike1990]

Check the MAF, o2 sensor and EGR valve

[budgie]

going to give that slick 50 a go for the simple fact when the car got mot,d it would have been sitting nearly 2 weeks and then when the other half drove it down to garage dout she went above 25, S o im putting that in and driving 28 mile to a old garage i used to use to get them to check the emissions then and if still over im leaving it there and they can deal with it,lol....  good garage tho i must add

[Nino]

Good lad u won't regret that slick 50

[budgie]

Good lad u won't regret that slick 50

and got it for £12 on ebay

[budgie]

Just read the add the lad had up when selling the car.. Its de-cated on the downpipe, would this also have an effect?

[barrym381]

Just read the add the lad had up when selling the car.. Its de-cated on the downpipe, would this also have an effect?

yes 

[Nino]

Yes a decat will fail mot = high emissions hence why I won't decat my car. However I would be interested to see if slick 50 would help you pass.

[budgie]

Yes a decat will fail mot = high emissions hence why I won't decat my car. However I would be interested to see if slick 50 would help you pass.

il still give it a try, save the garage doing my exhaust.

[dom]

If you're running a decat you won't get the emissions low enough to pass an MOT. You'll either have to find a 'friendly' MOT tester or fit a cat/sports cat