I was surprised to have this result. The only but very annoying thing it failed on was item 7.3.B.1a, regarding carbon monoxide emissions.
I think that my carb has been running rich after being tweaked a few months ago. Would adjusting the carb to make it run leaner get those emissions down to a pass level?
Cheers.
Van Failed its MOT - CO emissions - update
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Van Failed its MOT - CO emissions - update
Last edited by Ralf85 on 23 Jan 2018, 13:49, edited 1 time in total.
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Re: Van Failed its MOT - CO emissions
In short, yes. High CO is normally too much fuel, not enough air. How high was high?
Assuming you have the Solex 34 Pict 5 on your DF engine still then its too brass screws on the side to adjust air-fuel volumes at idle - these chaps do a good guide for an earlier version of the carb, same principals apply: http://www.vw-resource.com/34pict3.html
Worth checking it has a clean air filter and was tested warm/hot as well.
Assuming you have the Solex 34 Pict 5 on your DF engine still then its too brass screws on the side to adjust air-fuel volumes at idle - these chaps do a good guide for an earlier version of the carb, same principals apply: http://www.vw-resource.com/34pict3.html
Worth checking it has a clean air filter and was tested warm/hot as well.
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Re: Van Failed its MOT - CO emissions
Cheers buddy. That is really helpful.
Re: Van Failed its MOT - CO emissions
Maybe an old wive's tale and call me old fashioned but I always like to give the engine a bit of a thrash before I drop the van/car in for an MOT. A couple of junctions on a motorway at 70MPH on a warmed up engine seems to work for me.
CS
E D I T:
Sorry delete "thrash" and 70 MPH and insert "As quickly and safely as the vehicle in question can reasonably go"
CS
E D I T:
Sorry delete "thrash" and 70 MPH and insert "As quickly and safely as the vehicle in question can reasonably go"
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"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
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Van Failed its MOT - CO emissions - update
I left the van with my garage yesterday to adjust the carb back to its correct set-up. The van has now passed the MOT test and been serviced. I collected it this morning in a jolly mood.