My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9, 
pass is no more than 3.
Any suggestions on how to get the emissions down ?

Many thanks

"Tom McCabe"  wrote in message 
news:dd9prh$shq$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...

> My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9, 
> pass is no more than 3.
> Any suggestions on how to get the emissions down ?
>


Start by looking for things like cracked/split vacuum hoses. Sometimes 
something very simple can screw the whole thing up.

I.

"Tom McCabe"  wrote in message
news:dd9prh$shq$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...

> My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9,
> pass is no more than 3.
> Any suggestions on how to get the emissions down ?
>


A reading of 9 is very smokey! Have you noticed excess smoke recently, or
was the car not properly warmed up or not purged before it was tested?

Borderline Diesels need to be fully hot, and preferably run with a strong
injector cleaner in the tank leading upto the test, dont forget to give it a
goodly thrash to blow out the accomulated carbon from the exhaust too.

A new airfilter and fresh oil are obviously needed to begin with.

Tim..

"Tom McCabe"  wrote in message 
news:dd9prh$shq$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...

> My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9, 
> pass is no more than 3.
> Any suggestions on how to get the emissions down ?
>
> Many thanks


Long blast at flat out in third till it clears up, obvious stuff like air 
filter.   Fresh oil can reduce the smog a little.   Stinking hot when you go 
for test.  If it still won't get anywhere near the magic three, first check 
the timing then a recon set of injectors (unless recent anyway).  If it is 
very close but not quite, then a bottle or two of cleaner can reduce it a 
bit, some people even shove some paraffin in the tank for the test (I 
wouldn't)  Other than that, take it to a diesel specialist and ask them, it 
may need a pump.

mrcheerful

> My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9, 
> pass is no more than 3.
> Any suggestions on how to get the emissions down ?


Get the oil and filter changed, and fuel filter and air filter.  Then get 
the engine nice and warm, and take it for a really good blast, running it 
right up to the redline in all gears, and holding it there for a good while 
(but for heaven's sake make sure it's *properly* warmed up before doing 
this).  When you get back to the MOT station, leave it idling for a good 
minute or two after that sort of hard treatment, including driving it gently 
for the last mile or two, then that should do the trick.

Either that, or a new set of injectors.

-- 
Peter

"You're not a real UKRCMer until you've had your big end bearings go."

That's exactly what I did for my last MOT with my '99 Rover 200 diesel
(same engine as OP's 400), and had a PM reading of 0.17 on the test...
Mind you, that did include a blat at 120mph on the testing circuit we
have at work...

a.tucker@derby.ac.uk wrote in news:1123587557.363303.107400
@g49g2000cwa.googlegroups.com:


> That's exactly what I did for my last MOT with my '99 Rover 200 diesel
> (same engine as OP's 400), and had a PM reading of 0.17 on the test...
> Mind you, that did include a blat at 120mph on the testing circuit we
> have at work...
> 
> 

You have a testing circuit at work? You jammy bugger! Got any jobs?

-- 
Stuart Sharp

"mrcheerful ."  wrote in message 
news:np_Je.85193$G8.75882@text.news.blueyonder.co.uk...

>
> "Tom McCabe"  wrote in message 
> news:dd9prh$shq$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...
>> My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9, 
>> pass is no more than 3.
>> Any suggestions on how to get the emissions down ?
>>
>> Many thanks
>
> Long blast at flat out in third till it clears up,


Don't forget to change cambelt if required!

Yep - http://tinyurl.com/9h3rq

I love my job - regular opportunities to thrash Jag/LR/A-M cars to the
limits :-D

No vacancies at the moment I'm afraid though!

Andy

Matt wrote:

> "mrcheerful ."  wrote in message
> news:np_Je.85193$G8.75882@text.news.blueyonder.co.uk...
>>
>> "Tom McCabe"  wrote in message
>> news:dd9prh$shq$1@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...
>>> My 98 Rover 400 diesel has failed the MOT emission test. Reading of
>>> 9, pass is no more than 3.
>>> Any suggestions on how to get the emissions down ?
>>>
>>> Many thanks
>>
>> Long blast at flat out in third till it clears up,
>
> Don't forget to change cambelt if required!


Before or after?

Tom McCabe wrote:

> My 98 Rover 400 diesel has failed the MOT emission test. Reading of 9, 
> pass is no more than 3.
> Any suggestions on how to get the emissions down ?
> 
> Many thanks


Thanks for all the helpfull advice. Someone at work suggested putting 3 
litres of petrol into half a tank of diesel ????

Hi

Had a similar problem with my Audi 80TDi Avant (1995). Currently on 145k.  
Try a can of Forte diesel conditioner straight into the fuel filter resevoir.
  Change oil and filter (consider using STP engine cleaner) prior to 
draining) and fit a new air filter.  Also double-check breather hoses - as 
they get quite dirty over time.

As suggested - run the car in 2nd or 3rd gear with high revs.  You should 
see black smoke initially as the carbon/soot deposits are blown out.  Double 
check your timing belt is up to the job - and isn't in need of replacement 
prior to doing this.

You'll need to replace the fuel filter on completion - as Forte doesn't do 
it any favours.

Good luck.

Spart


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