NCT low idle emissions fail

foxdave_artist

foxdave_artist

New member
Hi lads, just back from NCT and who do I meet... another lovely scooby. A really lovely type R. Anyways the silver v2 is mine. She's failed twice now on emmisions and the NCT guy was sound in fairness, hes says it wont go through again. Said the cat is okay as passed on high idle but the low idle is way off and could possibly be an electric issue. Any advice. Its strange because its just out of MOT too. I drove the car hard before to get heat into the cat and I added cataclean. The fail sheet is attached below. I do have the car booked in for an ESL board fitted and mapped in late June. So maybe its best I wait until then? Though I'm just wondering if there is a sensor issue etc should i have this sorted before the map or will be mapper be able to figure it out for me? (Hoping it's not a waste of time for both of us) No obd reader on these earler ones so not sure how to figure it out myself. Thanks in advance!1000083981.jpg
 

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I had a similar issue, I changed both o2 sensors, changed lambda, changed MAF... No good. Turns out it was just an exhaust gasket.
On 4th turn, I said I'd change them all from manifold back, and it passed. Got it right hot before hand again.
Triple check for leaks. Could be a simple fix 👌
 
foxdave_artist said:
@Eoinmack Hi Eoin. Lamba and all was good so I think it's running very rich but ill definitely check for any leaks over the weekend. 👍👍
Click to expand...
Well, rich would be caused by a leak too, it would read rich if it's drawing in more air through a leak too, deffo give it a good check 👌
 
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