how to pass emmisions test in N.C.T.?

owlite700

V.W. golf 1.4 petrol 60.000 miles has failed four consecutive tests due to emmisions. Air filter changed, Carb changed ,exhaust sensor changed, even tried mixing kero with the fuel to try to cheat the test equipment.
:mad: Getting very vexed

Anan1

This has been done a couple of times recently, best advice seems to be to bring it to a garage with an exhaust gas analyzer.

JHMEG

and also, what did it fail on?

Mayshine

Stick your licence plates and discs on another golf that will pass. Not sure this is really recommended though. lol

ji

Drive the ****e outta it on the way to the test..works every time..

Like 3 gear at 60mph for about 3 miles should do..

ronnie3585

ji wrote: »

Drive the ****e outta it on the way to the test..works every time..

Like 3 gear at 60mph for about 3 miles should do..

+1

Get the cat red hot before you send it in for the NCT, I've seen the dirtiest cars get through by doing this.

DublinDilbert

owlite700 wrote: »

Carb changed

Who changed the Carb for you?

Henry Ford III

Carb? How old is it?

groupb

owlite700 wrote: »

V.W. golf 1.4 petrol 60.000 miles has failed four consecutive tests due to emmisions. Air filter changed, Carb changed ,exhaust sensor changed, even tried mixing kero with the fuel to try to cheat the test equipment.
:mad: Getting very vexed

Must be a very old car if it needed a carb. Leave it in a low gear and drive it hard. Try one of the STP or redex fuel treatments.

Mycroft H

groupb wrote: »

Must be a very old car if it needed a carb. Leave it in a low gear and drive it hard. Try one of the STP or redex fuel treatments.

Redex in the carb itself, it i'l splutter and smoke for a while, but it will clean the carb. Then drive the shyte out of it and blow all the crap out of the engine

poxx

Maby you should consider getting the car looked at by someone that knows something about cars!;)

poxx

poxx wrote: »

Maby you should consider getting the car looked at by someone that knows something about cars!;)

exactly. Wasting money on fuel additives that dont work and 'driving the ****e' outta it also are a waste of time. Get the car ecu scanned for faults, emmissions checked on a gas analyser.That will give you a good idea as to whats wrong.These give lots of cat problems and temp sensor probs

owlite700

The car is 2000.My local garage had it on an analyser and have tried replacing the temp sensor as well.All to no avail.Thats why I posted this thread to see if anyone had any other ideas.
The mechanic reckons its the piston rings are going.

Disky

owlite700 wrote: »

V.W. golf 1.4 petrol 60.000 miles has failed four consecutive tests due to emmisions. Air filter changed, Carb changed ,exhaust sensor changed, even tried mixing kero with the fuel to try to cheat the test equipment.
:mad: Getting very vexed

Ever consider the fact that they want you to buy a new car??

These emission tests will get so tough that most cars will not past. They want you either off the road or in something electric.

david

BS. They are set to manufacturers specifications.

Your car does not have a Carb

Do not switch reg plates, one extra dodgy motor on the roads. And they check your VIN also.

Mayshine

twas a joke a about the numberplates. I would hope people would not take that seriously.

Anan1

owlite700 wrote: »

The mechanic reckons its the piston rings are going.

That thought had crossed my mind too, that engine is known to be quite soft.

JHMEG

4 fails is not funny. You need to find a better garage. Any decent mechanic should be able to sort this out fairly easily.

Anan1

JHMEG wrote: »

Any decent mechanic should be able to sort this out fairly easily.

As long as it's not due to bore wear..

mickdw

Those engines are crap I hear so yes maybe its just f*cked.

JHMEG

Anan1 wrote: »

As long as it's not due to bore wear..

It would be sorted out fairly easily, as mechanic would have diagnosed by now that it needed a new engine. 4 fails for the same problem is taking the wiz...

Scottie99

Try this stuff, I've used it before and it worked

http://www.dipetane.com/

owlite700

I think it is bore wear or rings as there is a bit of blowback into the air intake.Engine runs fine though.We have to go for a full retest now as the time since the first test is nearly a month.I would hate to have to replace an engine that runs fine over a bit of blowback.Im going to disconnect the blow back pipe ,and redirect it for the next test.And i will give the above stuff a try.the test isnt for 3 weeks, I will post the results asap.If that doesnt work there will be smoke alright!!! thanks for all the help

poxx

What are the readings that it is failing on?

beam99

What were your readings that it failed on, I had a 99 1.4 golf this week for the same problem, a fair bit of blow back from the engine as well, the nct readings were,
co = 1.08 vol% above 0.3= fail
hc = 476ppm LIMIT= above 200ppm = fail
lamba = 1.083 between 0.97and 1.03


I now have the following readings after doin some work on it

co = 0.20
hc = 100
lamba =1.026

Vain

Hey I have a 1.4 mk4 golf that failed the nct twice on emmisions. Got a new breather box (oil separator) It was full of crap in it and a 2nd hand lamba sensor from a audi and it flew through it.