ANY TRICKS FOR NCT EMISSIONS TEST ??

bookerboy

Emissions retest coming up next week.Anything i can do with the car to increase chances of passing,It is a 03 Diesel Mondeo.
I have heard that if you give the car a long fast run before the test it could help.
Any advice please?

itarumaa

Post the values of the current NTC test here, so it is easier to guess.

But yes if you heat up the car really well before the test, it might help. BUT it depends where the problem is first place.

baldoyleautos

bookerboy wrote: »

Emissions retest coming up next week.Anything i can do with the car to increase chances of passing,It is a 03 Diesel Mondeo.
I have heard that if you give the car a long fast run before the test it could help.
Any advice please?

Put Diesel fuel cleaner in the tank and give it a good high revving drive

bookerboy

They have not done an emission test yet because there was to much enging oil in the car.I am having some drained out before i go back for retest.
Everything else was fine so would hate to fall at the last hurdle.

Mr Benevolent

You don't have to give it a good fast drive, you just have to keep the revs high by using a lower gear. Safer that way.

biko

From another thread

derry wrote: »

Me I take the car for a burn in low gears a few days before the test to blow out carbon deposits .The day for the test I leave the car on tick over for a half hour to get it toasty hot and then drive to center in low gears revving the crap out of the engine close to red line.When I get to the test center I leave the engine running all the time while waiting for the tester to collect the car.
Its good to bring the spare key so if you have to leave the key with the reception that you can keep the engine running to keep the heat up .
The hotter the engine is and the hotter the cat is the better the results will be.
Most stone cold engines will fail the NCT test as the cat is too cold or the engine is to cold fuel burn badly and the figures are bad .
Then adding the aditives can help a few days before test to blow out the crap.

If you got deep pockets no problem to pass the test just employ a mechanic to sort it.However if funds are tight then basics are

1 /
Replace or clean spark plugs and clean contacts and ditributor if its not eletronic ignition.
2 /
Verify the fuel is clean and no water in the fuel lines.buy the best petrol from a big gargage where they refill frequently as some small stations can have staler petrol which has higher water content .
3/
If possible get a service but failing that get the engine tuned up or failing that tune the engine yourself or failing that check the engine choke isnt stuck on all the time .Some guys the day of the test remove the air filter as that can act as a cock on a sick engine but its risky as the dirt can eneter the works so most rove the filter within a short distance of the testing center .A dirty or old air filter can also act as a choke and replacing with new filter can somtimes help

4/
Replace the fuel in the tank completly with clean petrol if the petrol is old as that stale fuel mixxed with good fuel can really screw up the reading Additives can help remove crud on the fuel pipe works

5 /
For very sick motors if you know what you do adjust the fuel types preferably several weeks ahead to verify what works and watch out that the alcohol fuel doesnt take any water in the tank up to the engine as thealcohol fuel soaks up water like a sponge .Very old cars for leaded petrol possibly cant do alcohol due to issues that the rubber cant take alcohol but most modern cars have no issues with that .
If you got it then put in some racing petrol but maybe not 100% in case the engine doesnt take to it so start with 20% and the increment in 10% units until its close to 100% .If the engine doesnt like it so pre just add some more ordinary petrol to get back to where engine ran good before

Keep the car and CAT very hot for the test and then You increase the chances to pass the NCT emmissions test

Keep us posted how you get on

Derry

YbFocus

Put a small amount of petrol in your tank (1 to 2 litres only) and fill it off with diesel, i've seen cars pass after failing on emmisions, it clears them out well, need to have it done and be driving it for a week in advance!
Also if she was over full with oil shes probably burning a bit and shes smoky! Doesnt help either!

bookerboy

Great advice,just what i was looking for.Thanks lads.

mugsir

4 years later this thread is still useful. Thanks lads!

bookerboy

By the way.I did put some petrol in with the Diesel a couple of days before the test and passed no problem.

Matt Simis

Diesels dont have an emission test, they have a pi$$ easy to pass smoke test.

Anyhow, I wouldnt be putting in Petrol into a diesel, put in Kerosene instead. A clean burning oil with less of a lubricity issue than Petrol, which is just flat out bad for pump, injectors etc. Its not (properly?) combustible by compression either.

snaps

Matt Simis wrote: »

Diesels dont have an emission test, they have a pi$$ easy to pass smoke test.

Anyhow, I wouldnt be putting in Petrol into a diesel, put in Kerosene instead. A clean burning oil with less of a lubricity issue than Petrol, which is just flat out bad for pump, injectors etc. Its not (properly?) combustible by compression either.

then get done by customs!

fabsoul

lock it up