Failed NCT on High Idle CO on 04 Almera

bigdave000000

Engine/Oil Temperature 85C

Low Idle CO 0.29% above 0.30% fail PASS
(860 rpm) HC 107ppm above 0ppm fail N/A

High Idle Lambada: 1.00 not above 0.97 and 1.03 fail PASS
(2,800 rpm) CO 0.36% above 0.20% fail FAIL/REFUSAL
HC 101ppm above 200ppm fail PASS

Oil and filter changed 7 days ago and Redex added to fuel for the last week, engine tested at operating temperature.

Can anyone offer suggestions how to get high idle emissions down to pass this?

Thanks in advance

josealdo

bigdave000000 wrote: »

Engine/Oil Temperature 85C

Low Idle CO 0.29% above 0.30% fail PASS
(860 rpm) HC 107ppm above 0ppm fail N/A

High Idle Lambada: 1.00 not above 0.97 and 1.03 fail PASS
(2,800 rpm) CO 0.36% above 0.20% fail FAIL/REFUSAL
HC 101ppm above 200ppm fail PASS

Oil and filter changed 7 days ago and Redex added to fuel for the last week, engine tested at operating temperature.

Can anyone offer suggestions how to get high idle emissions down to pass this?

Thanks in advance

i had an high idle fail and it was the gasket holding the lambda sensor on the exaust manifold . 13 euro , replaced that and it flew past

i suspect you have a leak somewhere on your exaust

George Dalton

josealdo wrote: »

i suspect you have a leak somewhere on your exaust

Unlikely with a lambda figure of 1.00

OP it looks very much like a catalytic converter issue. But the figures are only slightly on the high side so a good fuel system treatment and an Italian tune up might get it through on a retest.

josealdo

George Dalton wrote: »

Unlikely with a lambda figure of 1.00

OP it looks very much like a catalytic converter issue. But the figures are only slightly on the high side so a good fuel system treatment and an Italian tune up might get it through on a retest.

and a gallon of cataclean . lol

mullingar

+1 on the cat, but just get your exhaust system checked for any leaks. A leaky exhaust will cause an inflated CO level

bigdave000000

Thanks for the replys.

Could somewhere like First Stop check for exhaust leaks?

josealdo

bigdave000000 wrote: »

Thanks for the replys.

Could somewhere like First Stop check for exhaust leaks?

i guess they could or if you know someone with a pit or a lift ?

jimgoose

That's not an exhaust leak. How old are the plugs?

josealdo

jimgoose wrote: »

That's not an exhaust leak. How old are the plugs?

yea man , my corolla had a high co reading , the plugs were in bits , the air filter was stink

bigdave000000

air filter and plugs were changed by me in may 15

boardsuser1

bigdave000000 wrote: »

air filter and plugs were changed by me in may 15

May 2015???wtf!!!!!!!how much mileage did you do in that time

bigdave000000

6000ish miles.

There is 120,000 miles on the clock and its burning some oil

boardsuser1

bigdave000000 wrote: »

6000ish miles.

There is 120,000 miles on the clock and its burning some oil

That's probably why. Service the engine and send it back in. I had a nissan primera of the same year.serviced it every 5000 miles and it always flew through on emissions. If you don't look after your car it won't look after you

bigdave000000

I bought it last January, it had only been serviced. In may changed oil,oil filter, plugs, air filter and pollen filter. Got new discs and brake pads in November. I will change plugs and air filter tomorrow and try an Italian tune up on the way for retest on tuesday.

JohnBoy26

KC161 wrote: »

That's probably why. Service the engine and send it back in. I had a nissan primera of the same year.serviced it every 5000 miles and it always flew through on emissions. If you don't look after your car it won't look after you

6000 miles or 8 months is nothing for plugs though and unless the op is driving on dusty roads the air filter won't be that dirty either.

boardsuser1

JohnBoy26 wrote: »

6000 miles or 8 months is nothing for plugs though and unless the op is driving on dusty roads the air filter won't be that dirty either.

Those nissan's have a mind of their own hence they are a nightmare to shift. George Dalton is the man to answer these more recent posts

JohnBoy26

KC161 wrote: »

Those nissan's have a mind of their own hence they are a nightmare to shift. George Dalton is the man to answer these more recent posts

?

boardsuser1

JohnBoy26 wrote: »

?

Read back through the tgread you'll see his name. He is a self employed mechanic/car dealer. Knows his stuff.

bigdave000000

Full service and dipetane added caused a lo idle fail on re-test.

It took a new cat to pass NCT

Big Wex fan

The better half's Almera failed exact same thing. Mechanic recommended a universal cat converter. What size would fit the Almera? Seen 2'' for 65E on ebay.

bigdave000000

I got a second cat put on halfway down the exhaust.

this place here did it for me autoexhausts.goldenpages.ie/

Highly recommend them

Big Wex fan

What did it cost you?

bigdave000000

€200

bigdave000000

passed Nct no problem

Big Wex fan

bigdave000000 wrote: »

I got a second cat put on halfway down the exhaust.

this place here did it for me autoexhausts.goldenpages.ie/

Highly recommend them

Belated update. got a garage to swap out the cat converter with a scrap yard cat & this worked. It was a gamble because you dont know until its in if its any better than the 1 that was removed. E70 for the cat & E80 for the labour.