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Author Topic: Failed Emissions Test....Help!  (Read 5133 times)

Offline xxChrisxx

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Re: Failed Emissions Test....Help!
« Reply #10 on: 27 April 2014, 10:45 »
First of all. How hot was the car when you took it? I dont mean coolant tenp showed correct.

If the garages sensor is showing lamda as within spec then its not a fuelling issue which means changing your lambda sensor will do nothing to help..

The lambda showed you are running lean in the test condition. Which would normally mean less CO, due to less partial combusion.

Catalysts work on a surface area and require temperature to work. A standard cat has a large surface area to react enough CO to pass at low temperatures (approx 240c).

A sport car has less surface area for the catalysis reaction so needs to up to full operating temperature (450c ish).
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Offline oceanic-green

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Re: Failed Emissions Test....Help!
« Reply #11 on: 27 April 2014, 16:56 »
Quote from: xxChrisxx on 27 April 2014, 10:45
First of all. How hot was the car when you took it? I dont mean coolant tenp showed correct.

If the garages sensor is showing lamda as within spec then its not a fuelling issue which means changing your lambda sensor will do nothing to help..

The lambda showed you are running lean in the test condition. Which would normally mean less CO, due to less partial combusion.

Catalysts work on a surface area and require temperature to work. A standard cat has a large surface area to react enough CO to pass at low temperatures (approx 240c).

A sport car has less surface area for the catalysis reaction so needs to up to full operating temperature (450c ish).

It wasn't very hot at all actually. How long should I drive it for to get it hot enough to warm up. Thanks!
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Offline xxChrisxx

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Re: Failed Emissions Test....Help!
« Reply #12 on: 27 April 2014, 17:40 »
You'll want it stinking hot. The longer and harder the drive the better. Wouldn't be able to tell you how long a drive though.

A normal decent a road drive shoud eventually get it up to temp. But you want to really soak everythinh with heat to allow for a cooldown period.

Ideally you dont want it sitting round too long at the MOT station before the test.

« Last Edit: 27 April 2014, 17:42 by xxChrisxx »
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Offline oceanic-green

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Re: Failed Emissions Test....Help!
« Reply #13 on: 27 April 2014, 17:43 »
Ok, thanks mate!  :smiley:
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Offline oceanic-green

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Re: Failed Emissions Test....Help!
« Reply #14 on: 01 May 2014, 19:28 »
Update....I spoke to the MOT tester and he told me to drive it like I stole it haha, So I took her for a hard going over for 40 mins  :laugh: I could feel the heat coming from the side of the car when I got out. The MOT tester took her straight in and started the emissions test, but there was no change at all  :sad: I have contacted the company that fitted the Sports Cat (as it has a life time guarantee) and they are going to do some tests on Tuesday. Fingers crossed they can sort her out!
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!

Offline XMC1980

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Re: Failed Emissions Test....Help!
« Reply #15 on: 01 May 2014, 20:09 »
Who built the custom exhaust out of interest?
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Offline oceanic-green

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Re: Failed Emissions Test....Help!
« Reply #16 on: 02 May 2014, 08:02 »
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Offline xxChrisxx

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Re: Failed Emissions Test....Help!
« Reply #17 on: 02 May 2014, 20:17 »
Did it fail by the same amount as last time.
If it did, it sounds like a possible duff cat.
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Offline XMC1980

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Re: Failed Emissions Test....Help!
« Reply #18 on: 03 May 2014, 00:23 »
Or ask a different garage if they can do emissions for you just out of curiosity? It's highly unlikely but calibration or all sorts could have an effect? Nothing to lose
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Offline oceanic-green

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Re: Failed Emissions Test....Help!
« Reply #19 on: 05 May 2014, 10:45 »
Quote from: xxChrisxx on 02 May 2014, 20:17
Did it fail by the same amount as last time.
If it did, it sounds like a possible duff cat.

Yes mate, it did. I go my appointment tomorrow with the company that fitted the sports cat, so hopefully they will change it if it is faulty
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!
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