Surely this can't be right?
#1
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Surely this can't be right?
I've just spent a fortune on a forged rebuild on my V3, plus simtek. I also put on a H&S sport cat downpipe to save the hassle of swapping at MOT time but it still failed on emissions and they had to put a second cat on? My car had a new O2 sensor put on and apparently mapped beautifully (and by a very well respected mapper). Is it because the simtek runs slightly rich for safety?????
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did it fail on LAMBDA or co and hc?
if lambda passed then the fuelling is fine so it is not the map or the o2 sensor but the cat not hot enough or working well enough.
Simon
if lambda passed then the fuelling is fine so it is not the map or the o2 sensor but the cat not hot enough or working well enough.
Simon
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I had a similar issue on mine recently. Have the Ninja sports cat and up til this year it had always got me through the MOT. This time around it passed cold idle but failed on the fast idle test.
The difference between this year and other years......the weather was a lot colder this year and apparently sports cats only work effectively when hot. Therefore if your car is left in the cold for a while before testing the cat may not be functioning as it should be.
Ns04
The difference between this year and other years......the weather was a lot colder this year and apparently sports cats only work effectively when hot. Therefore if your car is left in the cold for a while before testing the cat may not be functioning as it should be.
Ns04
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#11
It doesn't effect me much anyway as my car has the emissions of a 1.2 Corsa apparently. Was just wondering if you could have an "MOT" map and then switch back after. I will be getting a sports CAT eventually just to make sure.
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