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96 import failed mot on emissions. HELP...
As the title says, it has a full de-cat, front mount, induction kit.
fast idle co = > 8.358 hc = > 229 lambda => 0.782 second fast idle co = > 8.153 hc = > 255 lambda => 0.786 natural idle co = > 2.020. how can i bring these figures down,- de-cat is welded into place |
You need a cat or a friendly mot.
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i told the mot bloke it was a pre 95 import engine. and he said even if he did a non cat test it would still fail as the co's are so high. is there another way th bring them down. if i was to fit a cat my exhaust would need modifying as there are no flanges for a cat to bolt onto.
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borrow a system for the day? surely some forum member local can help
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Either need to swap the whole system from a similar aged car, I know all classics will fit the same but you need to be careful some of the sensors are different plug shapes. Some have a pre cat lamba others have one after or both. I had this issue when I brought an exhaust to fit my decatted scooby. Tho I the end i went and had a quiet word with a few places and found somewhere quiet I could get an test without emissions, Vosa are keen on garage checks, mot may loose thier liceance if caught.
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Not to sound silly but have you checked your plugs and leads working correctly? In general it's a healthy engine? Maf working currently?
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yeah thats what he says, he is quite lenient and will turn a blind eye but says these figures are way out.
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pm you mate ;)
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to be honest i have just cleaned the maf and the icv, should i do anything else ecu relearn or something
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Originally Posted by blackvenom
(Post 11150939)
Not to sound silly but have you checked your plugs and leads working correctly? In general it's a healthy engine? Maf working currently?
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Originally Posted by robscoobyclay
(Post 11150893)
i told the mot bloke it was a pre 95 import engine. and he said even if he did a non cat test it would still fail as the co's are so high. is there another way th bring them down. if i was to fit a cat my exhaust would need modifying as there are no flanges for a cat to bolt onto.
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Originally Posted by Rescue Dude
(Post 11150997)
You only have a non cat test if the car/engine is pre 1st August 1992.
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Your afr with that lambda is about 11.5 which is about right for a mapped impreza which is modded. but it will never pass an mot even with a cat fitted. To get a proper pass you would need the fuel and air system back to standard and then fit a cat. No point doing this. Find another mot garage.
Have you had it remapped? |
Originally Posted by jason_2013
(Post 11151341)
Your afr with that lambda is about 11.5 which is about right for a mapped impreza which is modded. but it will never pass an mot even with a cat fitted. To get a proper pass you would need the fuel and air system back to standard and then fit a cat. No point doing this. Find another mot garage.
Have you had it remapped? i did have a look at the ecu and there was no mappers label on it, i think i really need to get it on the rollers. |
Where did it pass its MOT last time?? Can you take it back there (cough) :D
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got a couple of places lined up now ;-) cheers all
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