MOT Emmisions Failure

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J

Jack

Guest
Hi all

4.6 LPG Range Rover failed the emissions test today...... Its never just a
blown bulb is it!!!

Its a 1998 4.6HSE

What makes it worse is that the Cats were changed less than 8 months ago.

When I compare the figures from the last two years I have seen a decrease in
HC levels but an increase in CO

The figures on today's were

Limits Actual
CO: <3.5% 6.85%
HC: <1200ppm 127ppm

compared to last year

Limits Actual
CO: <3.5% 1.93%
HC: <1200ppm 438ppm

This stuff means nothing to me. It is being checked out on Thursday by a
garage but are there any simple known causes, or places to start looking.

Many thanks

Jack

--


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Jack wrote:
> Hi all
>
> 4.6 LPG Range Rover failed the emissions test today...... Its never just a
> blown bulb is it!!!
>
> Its a 1998 4.6HSE
>
> What makes it worse is that the Cats were changed less than 8 months ago.
>
> When I compare the figures from the last two years I have seen a decrease in
> HC levels but an increase in CO
>
> The figures on today's were
>
> Limits Actual
> CO: <3.5% 6.85%
> HC: <1200ppm 127ppm
>
> compared to last year
>
> Limits Actual
> CO: <3.5% 1.93%
> HC: <1200ppm 438ppm
>
> This stuff means nothing to me. It is being checked out on Thursday by a
> garage but are there any simple known causes, or places to start looking.
>
> Many thanks
>
> Jack
>


Sounds like the LPG system needs some adjusting, theres no need to run
CAT's if your running on LPG.
 


"murphwiz" wrote in message
> Sounds like the LPG system needs some adjusting, theres no need to run
> CAT's if your running on LPG.

The vehicle was tested on petrol and LPG..... Petrol was significantly worse
at CO: 8.18%

Spencer


 
In news:[email protected],
Jack <[email protected]> expelled:
> "murphwiz" wrote in message
>> Sounds like the LPG system needs some adjusting, theres no need to
>> run CAT's if your running on LPG.
>
> The vehicle was tested on petrol and LPG..... Petrol was
> significantly worse at CO: 8.18%
>
> Spencer

Blocked air filter/intake air hose sucking flat or shed it's inner lining.

--
EMB
change two to number to reply


 


"EMB" wrote in message

> Blocked air filter/intake air hose sucking flat or shed it's inner
lining.

> EMB

Funny you mention that.... I changed the complete air box and filter the
other day because it had cracked due to a misfire about six months ago. But
surely i would have noticed a decrease in power if a heavy breathing 4.6
wasn't getting enough air????

Regards



 
I have just read somewhere that vehicles with a gross vehicle weight in
excess of 2500kg are exempt from the emissions test. Is this correct.

Regards
Jack


 
In news:[email protected],
Jack <[email protected]> expelled:
> "EMB" wrote in message
>
> > Blocked air filter/intake air hose sucking flat or shed it's inner
> lining.
>
>> EMB
>
> Funny you mention that.... I changed the complete air box and filter
> the other day because it had cracked due to a misfire about six
> months ago. But surely i would have noticed a decrease in power if a
> heavy breathing 4.6 wasn't getting enough air????
>
> Regards

Probably not - emissions will rise significantly before you'll notice a loss
of power from a large engine!

--
EMB
change two to number to reply


 
On or around Tue, 29 Jun 2004 22:54:59 +0100, "Jack"
<[email protected]> enlightened us thusly:


>
>The figures on today's were
>
> Limits Actual
>CO: <3.5% 6.85%
>HC: <1200ppm 127ppm
>
>compared to last year
>
> Limits Actual
>CO: <3.5% 1.93%
>HC: <1200ppm 438ppm
>
>This stuff means nothing to me. It is being checked out on Thursday by a
>garage but are there any simple known causes, or places to start looking.

the LPG thing is out of tune. what LPG system is it?


--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"The breezy call of incense-breathing Morn, The swallow twittering
from the strawbuilt shed, The cock's shrill clarion, or the echoing
horn, No more shall rouse them from their lowly bed."
Thomas Gray, Elegy Written in a Country Churchyard.
 



"Austin Shackles" wrote in message .
>
> the LPG thing is out of tune. what LPG system is it?
>
>

Hi Austin

Its an EMMEGAS system that mixes in the air intake.

I have been doing some google research and it is possible I think that the
air flow meter is damaged after a back fire six months ago. I think I am
right in saying this could be the source of the problem as the tests were
pants on petrol too.

Regards


 
Jack typed:
> "EMB" wrote in message
>
> > Blocked air filter/intake air hose sucking flat or shed it's inner
> lining.
>
>> EMB
>
> Funny you mention that.... I changed the complete air box and filter the
> other day because it had cracked due to a misfire about six months ago.
> But surely i would have noticed a decrease in power if a heavy breathing
> 4.6 wasn't getting enough air????

I've known someone run a V8 on seven cylinders, we think for about a month,
and not know the difference .. ;) We know it was on seven because there
wasn't a spark plug in the cylinder, well, there _was_ a spark plug, this
one didn't have any central core, and wasn't connected to a HT lead either
... ;)

--
Paul ...

(8(|) ... Homer Rocks


 
"Paul - xxx" <[email protected]> wrote in message
news:[email protected]...
> I've known someone run a V8 on seven cylinders, we think for about a
month,
> and not know the difference .. ;) We know it was on seven because there
> wasn't a spark plug in the cylinder, well, there _was_ a spark plug, this
> one didn't have any central core, and wasn't connected to a HT lead either
> .. ;)

I was told mine was running on 7 cylinders once. I hadn't noticed either.


 
David French typed:
> "Paul - xxx" <[email protected]> wrote in message
> news:[email protected]...
>> I've known someone run a V8 on seven cylinders, we think for about a
>> month, and not know the difference .. ;) We know it was on seven
>> because there wasn't a spark plug in the cylinder, well, there _was_ a
>> spark plug, this one didn't have any central core, and wasn't connected
>> to a HT lead either .. ;)
>
> I was told mine was running on 7 cylinders once. I hadn't noticed either.

LOL

Had a friend with a Dodge Charger, Aus import so rhd, with a 7.2 (I think)
V8 .. he ran it on one bank for a weekend without noticing too much
difference, just that his fuel bill went up, and it wouldn't quite spin both
wheels, only one side .. Minedewe, he was a right pillock ;)


--
Paul ...

(8(|) ... Homer Rocks


 
On Wed, 30 Jun 2004 09:53:17 +0100, "Paul - xxx"
<[email protected]> wrote:

>Jack typed:
>> "EMB" wrote in message
>>
>> > Blocked air filter/intake air hose sucking flat or shed it's inner
>> lining.
>>
>>> EMB
>>
>> Funny you mention that.... I changed the complete air box and filter the
>> other day because it had cracked due to a misfire about six months ago.
>> But surely i would have noticed a decrease in power if a heavy breathing
>> 4.6 wasn't getting enough air????
>
>I've known someone run a V8 on seven cylinders, we think for about a month,
>and not know the difference .. ;) We know it was on seven because there
>wasn't a spark plug in the cylinder, well, there _was_ a spark plug, this
>one didn't have any central core, and wasn't connected to a HT lead either
>.. ;)

Had my V8 running on 7 cylinders for a few weeks, spent all day with
it off-roading at that time as well. I never noticed a lead had
dropped off the plug untill I happened to change the plugs.

Alex
 
On Wed, 30 Jun 2004 02:47:09 +0100, "Larry" <[email protected]>
wrote:

>Some classic vehicles are exempt from the MOT altogether but I have no idea
>which. Tanks maybe ?

Applies to heavy vehicles (over 3500kg) registered before 1960. Also
applies to Fire Engines, Recovery vehicles and some other esoteric
things, as described under Goods Vehicle Plating & Testing Regulations
1988, schedule 2, reg 4.

http://www.hmso.gov.uk/si/si1988/Uksi_19881478_en_11.htm#sdiv2

It its MGW is less than 3500kg, then it comes under Motor Vehicle
(Test) regulations 1981, which is not available online, so I can't
check it.

Alex
 
On or around Wed, 30 Jun 2004 10:18:38 +0100, "Paul - xxx"
<[email protected]> enlightened us thusly:

>David French typed:
>> "Paul - xxx" <[email protected]> wrote in message
>> news:[email protected]...
>>> I've known someone run a V8 on seven cylinders, we think for about a
>>> month, and not know the difference .. ;) We know it was on seven
>>> because there wasn't a spark plug in the cylinder, well, there _was_ a
>>> spark plug, this one didn't have any central core, and wasn't connected
>>> to a HT lead either .. ;)
>>
>> I was told mine was running on 7 cylinders once. I hadn't noticed either.
>
>LOL
>
>Had a friend with a Dodge Charger, Aus import so rhd, with a 7.2 (I think)
>V8 .. he ran it on one bank for a weekend without noticing too much
>difference, just that his fuel bill went up, and it wouldn't quite spin both
>wheels, only one side .. Minedewe, he was a right pillock ;)

I've had a rover V8 running on about 5½, and it still pulled quite well.
makes it harder to start.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
Soon shall thy arm, unconquered steam! afar Drag the slow barge, or
drive the rapid car; Or on wide-waving wings expanded bear the
flying chariot through the field of air.- Erasmus Darwin (1731-1802)
 
On or around Wed, 30 Jun 2004 08:17:28 +0100, "Jack"
<[email protected]> enlightened us thusly:

>
>
>
>"Austin Shackles" wrote in message .
>>
>> the LPG thing is out of tune. what LPG system is it?
>>
>>
>
>Hi Austin
>
>Its an EMMEGAS system that mixes in the air intake.
>
>I have been doing some google research and it is possible I think that the
>air flow meter is damaged after a back fire six months ago. I think I am
>right in saying this could be the source of the problem as the tests were
>pants on petrol too.

which petrol system is it? some AFMs are more prone to damage than others.

check all over the place for pipes blown off.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the power of our imagination -
we learned to talk." Pink Floyd (1994)
 
Austin Shackles typed:
> On or around Wed, 30 Jun 2004 10:18:38 +0100, "Paul - xxx"
> <[email protected]> enlightened us thusly:
>
>> David French typed:
>>> "Paul - xxx" <[email protected]> wrote in message
>>> news:[email protected]...
>>>> I've known someone run a V8 on seven cylinders, we think for about a
>>>> month, and not know the difference .. ;) We know it was on seven
>>>> because there wasn't a spark plug in the cylinder, well, there _was_ a
>>>> spark plug, this one didn't have any central core, and wasn't connected
>>>> to a HT lead either .. ;)
>>>
>>> I was told mine was running on 7 cylinders once. I hadn't noticed
>>> either.
>>
>> LOL
>>
>> Had a friend with a Dodge Charger, Aus import so rhd, with a 7.2 (I
>> think) V8 .. he ran it on one bank for a weekend without noticing too
>> much difference, just that his fuel bill went up, and it wouldn't quite
>> spin both wheels, only one side .. Minedewe, he was a right pillock ;)
>
> I've had a rover V8 running on about 5½, and it still pulled quite well.
> makes it harder to start.

I had a KH 250 that only ran on two pots in the rain .. but then _all_
Kawasaki triples did that .. ;)

--
Paul ...

(8(|) ... Homer Rocks


 
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