smelly since de-cat

[marc1330]

Im just posting to ask if anybody else has noticed that their car smells of burnt fuel since they have had a decat fitted.
I notice it when i stop and get out of the car, i can smell it when walking away. My car also feels a little flat since fitting of the de-cat.

 

[Jamesstone]

The flat spots are either due to damageing a lamba sensor or it may be that you need to re-map to suit the increase in fuel

Oh & the smell is normal, the cat usally re-burns all the un-used fuel but now it just get thrown out the back of your exhaust :approve:

 

[JimWu]

Same problem here mate its overfueling, i asked my mechanic how to sort it and he said stop f**king around with it a put the cat back on or get a remap. Well i know which option i would rather take

 

[Jamesstone]

RStuner map FTW! £170 delivered for the diy remap kit from hank, my 172 made 184.5bhp running the Group-N map along with de-cat & matched inlets, charly at surrey rolling road said it was running spot on mixture wise :approve:

 

[marc1330]

Cheers for replies. My friends and ther mot tester said exactly the same about leaving it alone. They just dont understand.
Thinking of investing in a remap or may just get Rs tuner. Is that £170 for the pro kit or standard and custom map. Sorry my knowledge is not so good on Rs tuner haven't had a good look at it so far.

 

[allyrs]

Any N/A car ive had ive never noticed any difference in de cating Some times its made it worse. I imagine a re map is pretty essential. Also many N/A engines really need a certain level of back pressure in the system to work effectively. I dont bother mucking about with cats these days- to much hassle at mot time for a couple of bhp.

 

[marc1330]

I must admit after driving a standard cup the other week it felt a lot more urgent than mine, I have to agree about the back pressure on N/a cars had a good deal on the de-cat so tried it. Thinking the plan is Rs tuner and take it from the there.

 

[Andyman]

Its well worth decating a 172 or 182.

Probably one of the best performance per pound mods you can do on it!!

 

[Martin_172]

i fitted my 182 manifold at same time as my decat so cant really say how much i gained but fitting the 2 of them together it pulls like a train!! and yeah the smell is normal.

the 2 decated 182s at the scottish RR day were running down on power iirc? but mine feels much quicker than it was!

 

[franx]

i fitted my 182 manifold at same time as my decat so cant really say how much i gained but fitting the 2 of them together it pulls like a train!! and yeah the smell is normal.

the 2 decated 182s at the scottish RR day were running down on power iirc? but mine feels much quicker than it was!

did you map it ?

 

[marc1330]

Gonna think about rs tuner then. Will the generic maps be ok and hopefully make it run better or is it worth having a custom map.
The only mods are decat, itg panel and stealth exhaust.

 

[Martin_172]

did you map it ?

nope its not been mapped yet, getting mapped once ive fitted my matched inlets and relocated my battery to move my air filter.