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Jay Bamrah

MOT emissions- put car on valet tune?

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I have a TD UEL NA TUNE, would my chances of passing emissions increase if I go onto the valet tune. 
 

2016 Subaru BRZ 35k miles on it

catless TD UEL+ overpipe 

stock everything else

 

thanks guys 

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I don't think so. Valet mode stops the car from revving so there's no hoonage. The MOT emission checks are done at idle.

AFAIUI remaps use the stock ECU for idle control and only really do their thing higher up the rev ranges when fueling and ignition need to be adjusted.

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Biggest bit of advice is make sure the cat is really warmed up before it goes through emission checks as you’ve not got the primary cat the secondary cat needs to be warmed up by running the engine. 

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I think emissions are usually measured at idle and also at load, around 2750rpm.
Our cars are usually quite close to the limit from standard, so yeah make sure it's warm.

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