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Do i need a remap again?
- Thread starter jase125
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You should get any and all mods done before you get remapped because engine mods will change the AFR, throwing the map off. I'm a motorbike man so don't want to pretend I know everything about cars, but as far as I know going decat really changes the flow rate through your engine meaning the air/fuel ratio isn't right. that's why it feels down on power.
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I thought you had to have a down pipe and decat upgrade before you went stage 2 any way that's what I was told by Nikki at hinkley
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I would get it on a dyno to check how it's running , I reckon it could be stage 1 as I don't think any one would tune it any further with the cat on IMO If it is then it's going to feel rocket powered with your mods if you stage 2 it
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Are you sure it's not the post cat lambda screwing coz of the really high emissions, because I've heard that happens when you go decat. You can buy a spacer or turn it off with a vag com I think.
To be honest mate it's probably because it thinks the cat is nackered because of the really high emissions. You can buy a spacer which will stop the lambda reading such high emissions or actually turn the post cat lambda off which will stop the error. The pre cat lambda helps sort the AFR, the post cat is the just to make sure the car is running as it should be and because you've removed the cat it thinks there's a problem. That's how I understand it anyway, I could be wrong.
That's probably because it's been mapped already it can't make adjustments to the map to make up for the decat so it's running lean. I'm not sure on this but if you get your car mapped and then the car decides the map isn't right, wouldn't it then start changing the map you just paid 300 odd quid for? Maybe when they remap your car it can't make adjustments to the map anymore so you putting on a decat has just really thrown off the AFR. I'm certainly not sure on that but it makes sense. I'm new to this so kind of at the end of my knowledge on the topic but I'm fairly confident the warning light is because of the emissions and the lack of power is because your AFR is off. A good tuner should fix the map and also be able to turn off the post cat lambda. Hopefully I've got that right and it's some help. As always any corrections are welcome, I'm here to learn and help
yeah I think your right,I had down pipe and de cat done few months ago and eml kept coming on for cat efficiency below threshold.
I didnt think mine was any slower maybe a little quicker and little louder.
My mate deleted the cat eml with laptop, as he was turnig my boost down a little as it was spinking to 30psi and I didnt want to loose a rod!
I think it can be deleted with vag com too,as some one already said.
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