Does anyone know where to start looking: my e34 M50 525 failed emission
test, too high hc value, about 150, max acceptable value is 100. This is on
idle speed, at 2000 rpm it’s only about 25 hc.
I changed the spark plugs, no effect to the idle hc value. So what is
wrong???
Tom
In article <y6_uc.137$mt…@read3.inet.fi>,
tom <alfa…@luukku.com> wrote:
> Does anyone know where to start looking: my e34 M50 525 failed emission
> test, too high hc value, about 150, max acceptable value is 100. This
> is on idle speed, at 2000 rpm it’s only about 25 hc.
What was the CO reading? If the CO was on the low side (it should be 0.7%
+/- 0.5) and the HC high, it’s running weak. First port of call would be
to check for air leaks after the AFM. The trunking from it to the plenum
would be my first call – remove and check carefully for splits, etc.
> I changed the spark plugs, no effect to the idle hc value. So what is
> wrong???
–
*The modem is the message *
Dave Plowman dave.so…@argonet.co.uk London SW 12
RIP Acorn
Comment by admin — July 22, 2010 @ 5:38 am
In article <y6_uc.137$mt…@read3.inet.fi>, tom <alfa…@luukku.com>
wrote:
> Does anyone know where to start looking: my e34 M50 525 failed emission
> test, too high hc value, about 150, max acceptable value is 100. This is on
> idle speed, at 2000 rpm it’s only about 25 hc.
> I changed the spark plugs, no effect to the idle hc value. So what is
> wrong???
> Tom
Just a guess but I suspect the fuel mixture was too rich if you got a
high hydrocarbon reading.
I’m not familiar with your car nor have I worked on such a problem
before but I would guess since your problem is at idle it could be the
idle air stabilizer valve (check if E34 M50 has one) or some other part
of the idle control system. I presume the car was warmed up and idling
smoothly when it was tested.
Perhaps someone else with better knowledge can comment.
Michael
Comment by admin — July 22, 2010 @ 5:38 am
>tom sat down and scribbled:
> Does anyone know where to start looking: my e34 M50 525 failed
> emission test, too high hc value, about 150, max acceptable value is
> 100. This is on idle speed, at 2000 rpm it’s only about 25 hc.
> I changed the spark plugs, no effect to the idle hc value. So what is
> wrong???
> Tom
Every time my 325 failed emissions it was the lambda probe at fault.
Can’t remember what the figures were that failed though.
–
Cheers
Rick
’92 E36 325 Coupe
http://bmw.aqua-maniac.co.uk
Comment by admin — July 22, 2010 @ 5:38 am
In article <xn0dj0alp1f2iu…@news.tiscali.co.uk>,
Rick Clark <rick.clarkREMOVET…@tiscaliANDTHIS.co.uk> wrote:
> Every time my 325 failed emissions it was the lambda probe at fault.
> Can’t remember what the figures were that failed though.
Surely that would give wrong emissions throughout the rev range, and not
just at idle?
–
*Aim Low, Reach Your Goals, Avoid Disappointment *
Dave Plowman dave.so…@argonet.co.uk London SW 12
RIP Acorn
Comment by admin — July 22, 2010 @ 5:38 am
>Dave Plowman honked his horn and wrote:
> In article <xn0dj0alp1f2iu…@news.tiscali.co.uk>,
> Rick Clark <rick.clarkREMOVET…@tiscaliANDTHIS.co.uk> wrote:
> > Every time my 325 failed emissions it was the lambda probe at fault.
> > Can’t remember what the figures were that failed though.
> Surely that would give wrong emissions throughout the rev range, and
> not just at idle?
You may be right, as I said, couldn’t remember the figures that failed.
When I get home, I’ll check through my filing cabinet as the failure
figures are probably in there somewhere.
–
Cheers
Rick
’92 E36 325 Coupe
http://bmw.aqua-maniac.co.uk
Comment by admin — July 22, 2010 @ 5:38 am
"tom" <alfa…@luukku.com> wrote in news:y6_uc.137$mt.38@read3.inet.fi:
> Does anyone know where to start looking: my e34 M50 525 failed
> emission test, too high hc value, about 150, max acceptable value is
> 100. This is on idle speed, at 2000 rpm it’s only about 25 hc.
> I changed the spark plugs, no effect to the idle hc value. So what is
> wrong???
> Tom
dang i’m glad to live in a state with no emmissions testing
Comment by admin — July 22, 2010 @ 5:38 am
In article <Xns94FB7461A48EAzyadayaday…@216.196.105.134>,
z <z…@yada.yada.com> wrote:
> dang i’m glad to live in a state with no emmissions testing
If a vehicle fails the emissions test, it’s almost certainly not running
correctly and using more fuel than it should. Now that you’re getting
close to a more realistic price for ‘gas’ these things might matter
more.
–
*The more I learn about women, the more I love my car
Dave Plowman dave.so…@argonet.co.uk London SW 12
RIP Acorn
Comment by admin — July 22, 2010 @ 5:38 am
Dave Plowman <dave.so…@argonet.co.uk> wrote in
news:4cb85ecfb1dave.sound@argonet.co.uk:
> In article <Xns94FB7461A48EAzyadayaday…@216.196.105.134>,
> z <z…@yada.yada.com> wrote:
>> dang i’m glad to live in a state with no emmissions testing
> If a vehicle fails the emissions test, it’s almost certainly not running
> correctly and using more fuel than it should. Now that you’re getting
> close to a more realistic price for ‘gas’ these things might matter
> more.
ya. I use a c0 meter to get my tii into running shape, but damn if i’m
taking my old ford wood hauling truck 150 miles some place to a testing
center
Comment by admin — July 22, 2010 @ 5:38 am
That’s fighting talk….again…
DAS
—
For direct contact replace nospam with schmetterling
—
"Dave Plowman" <dave.so…@argonet.co.uk> wrote in message
news:4cb85ecfb1dave.sound@argonet.co.uk…
[.......]
Now that you’re getting
- Hide quoted text — Show quoted text -
> close to a more realistic price for ‘gas’ these things might matter
> more.
> —
> *The more I learn about women, the more I love my car
> Dave Plowman dave.so…@argonet.co.uk London SW 12
> RIP Acorn
Comment by admin — July 22, 2010 @ 5:38 am
On Tue, 01 Jun 2004 16:39:47 +0100, Dave Plowman wrote:
> In article <xn0dj0alp1f2iu…@news.tiscali.co.uk>,
> Rick Clark <rick.clarkREMOVET…@tiscaliANDTHIS.co.uk> wrote:
>> Every time my 325 failed emissions it was the lambda probe at fault.
>> Can’t remember what the figures were that failed though.
> Surely that would give wrong emissions throughout the rev range, and not
> just at idle?
I was told that O2 sensor is effectively "out of the loop" significantly
above idle.
—
The instructions said to use Windows 98 or better, so I installed RedHat.
Comment by admin — July 22, 2010 @ 5:38 am
In article <40bcf9ce$0$20512$cc9e4…@news-text.dial.pipex.com>, Dori A
Schmetterling <n…@nospam.co.uk> wrote:
> That’s fighting talk….again…
>
> DAS
What, you mean about women? Or gas prices? …..Or BOTH?? ;#)
Michael
Comment by admin — July 22, 2010 @ 5:38 am
"Jim Levie" <j…@entrophy-free.net> kirjoitti viestissä
news:pan.2004.06.01.22.20.25.878073@entrophy-free.net…
> On Tue, 01 Jun 2004 16:39:47 +0100, Dave Plowman wrote:
> > In article <xn0dj0alp1f2iu…@news.tiscali.co.uk>,
> > Rick Clark <rick.clarkREMOVET…@tiscaliANDTHIS.co.uk> wrote:
> >> Every time my 325 failed emissions it was the lambda probe at fault.
> >> Can’t remember what the figures were that failed though.
> > Surely that would give wrong emissions throughout the rev range, and not
> > just at idle?
> I was told that O2 sensor is effectively "out of the loop" significantly
> above idle.
If I would take the car to some workshop with suitable testing device to be
connected to my E34 525′s M50 engine, is it possible to detect the faulty
part or the fault that causes the high hydrocarbon figures? I mean is there
a diagnostic connector in the car’s engine room that can be hooked to some
tester? I was told in a BMW dealer’s service that they don’t have the
suitable tools for the job, they only deal with E39 and newer cars?? My car
don’t have the Check engine light connected, I looked that up behind the
instrument console, so the ‘stomp test’ is out of the question.
tom
Comment by admin — July 22, 2010 @ 5:38 am
In article <%nhvc.109$lJ1…@read3.inet.fi>,
tom <alfa…@luukku.com> wrote:
> If I would take the car to some workshop with suitable testing device to
> be connected to my E34 525′s M50 engine, is it possible to detect the
> faulty part or the fault that causes the high hydrocarbon figures?
I’ve told you one likely cause in an earlier post. Have you checked the
trunking? It’s a five minute job.
> I mean is there a diagnostic connector in the car’s engine room that
> can be hooked to some tester?
Why do so many seem to think you need a fooking computer to check
*anything*?
> I was told in a BMW dealer’s service that
> they don’t have the suitable tools for the job, they only deal with E39
> and newer cars??
Think they just wanted shot of you.
> My car don’t have the Check engine light connected, I
> looked that up behind the instrument console, so the ‘stomp test’ is out
> of the question.
Fault codes are a diagnostic aid. You still in the end have to physically
maintain or replace parts, since a car consists of mechanical bits, not
software.
–
*Everyone has a photographic memory. Some just don’t have film.
Dave Plowman dave.so…@argonet.co.uk London SW 12
RIP Acorn
Comment by admin — July 22, 2010 @ 5:38 am
"Dave Plowman" <dave.so…@argonet.co.uk> > >
> I’ve told you one likely cause in an earlier post. Have you checked the
> trunking? It’s a five minute job.
Yes, I have checked the rubber tunnel going from afm to intake manifold and
it seemed to be ok although outside it looked as it had some small cracks.
The inside looked smooth and fine.
> Why do so many seem to think you need a fooking computer to check
> *anything*?
I wonder the same, but that’s what they do these days in the service, on new
cars anyway.
tom
Comment by admin — July 22, 2010 @ 5:38 am
>Rick Clark honked his horn and wrote:
> > Dave Plowman honked his horn and wrote:
> > In article <xn0dj0alp1f2iu…@news.tiscali.co.uk>,
> > Rick Clark <rick.clarkREMOVET…@tiscaliANDTHIS.co.uk> wrote:
> > > Every time my 325 failed emissions it was the lambda probe at
> > > fault. Can’t remember what the figures were that failed though.
> > Surely that would give wrong emissions throughout the rev range, and
> > not just at idle?
> You may be right, as I said, couldn’t remember the figures that
> failed. When I get home, I’ll check through my filing cabinet as the
> failure figures are probably in there somewhere.
Bit late as a follow up but……. I found the paper work and the CO
readings were the ones that failed on both occasions.
–
Cheers
Rick
’92 E36 325 Coupe
http://bmw.aqua-maniac.co.uk
Comment by admin — July 22, 2010 @ 5:38 am