Emissions & NCT fail.

JustAThought

Car passed all emissions tests in nct 3 weeks ago but failed on bumper alignment.Its now failed on emissions - 3 major emissions fails. It ran the NCT test again the same day and passed one of the same emussions tests but failed the third with no adjustments made only petrol added. I now have a bottle of DIPETANE and am told that by adding it to the engine and driving it hard it might magically pass. Car is an almera and an 06. Any suggestions - full or half full tank of petrol & how much to add? Instructions say 1:200 mix for fuel which doant help much. Feelung somehat despairing. I need that car for work. Never had any emissions note or fail on nct before. Many thanks

porsche boy

Wjat were the readings from the NCT??

JustAThought

Bumper test day - Low idle 0.24 vol PASS
Next test 3 wks later low idle 2.68 vol MF
Next test different lane same hour low idle 1.64% MF

Bumper test day - lambda 1.01 PASS
Next test 3 weeks later Lamda 0.96 MF
Next test different lane same hour Lamda 0.97 Pass

Bumper test day - CO 0.09% PASS
Next test 3 weeks later -CO 1.33 vol MF
Next test different lane same hour CO 0.96 MF

MF = major fail.

firstlight

Quarter bottle for quarter tank is what I use
Chuck another quarter in then when you fill the tank again
Never any bother with that on my car
Drive it on the motorway if you can,don't be afraid to drive it on a bit in the revs
Obviously don't redline it ha
Send it into NCT as warm as you can,as in do a few runs on dual carriageway or motorway first to get it up to temperature
Should pass then
Don't worry about it too much,cheap cars can be got with NCT now for little money
Dipetane always worked well for me

JustAThought

firstlight wrote: »

Quarter bottle for quarter tank is what I use
Chuck another quarter in then when you fill the tank again
Never any bother with that on my car
Drive it on the motorway if you can,don't be afraid to drive it on a bit in the revs
Obviously don't redline it ha
Send it into NCT as warm as you can,as in do a few runs on dual carriageway or motorway first to get it up to temperature
Should pass then
Don't worry about it too much,cheap cars can be got with NCT now for little money
Dipetane always worked well for me

Thank you so.much - 5:45 am & heading out to buy petrol & put that Diepetane stuff in & do a bit of high rev driving on the motorway fbefore 7am test. Fingers crossed. There is hope so.

porsche boy

JustAThought wrote:

Thank you so.much - 5:45 am & heading out to buy petrol & put that Diepetane stuff in & do a bit of high rev driving on the motorway fbefore 7am test. Fingers crossed. There is hope so.

Lets know how you got on.

JustAThought

porsche boy wrote: »

Lets know how you got on.

Fail again - failed worse. Still procrastinating. : (