[xj] Emissions Testing

This emissions thread sure seems to be acquiring a life of its own.

Remember that different jurisdictions are bound to have different standards.
What works to pass one test may cause you to fail another. For example,
here in Connecticut, back when only Hydrocarbons (HC) and Carbon Monoxide
(CO) were tested at idle, I have heard that one could detune something (I
forget what) on high-compression engines to the point that the car would
barely run, but it would pass. Now that Nitrous Oxides (NO) are measured,
this method is useless. The Jag mechanic who told me this described
Ferraris stumbling and backfiring their way through the testing lanes, but
passing.

Why don’t we collect (yes I’ll volunteer to collect and collate) data on
testing standards and results by jurisdiction? My last two vehicle
inspection reports
give the maximum measurements and test readings for each
test. If we know what works to achieve a pass of a particular standard, we
will know if we are comparing apples to oranges, or not. As our cats age
and emission standards tighten, passing standards the cars were never
designed for could become a real challenge.

Anyone who has any of this info (look at your local version of the vehical
inspection report) can email me off-list at psnovak@ct1.nai.net with
whatever data you have. In case I later decide to automate (in case of a
significant response) it would be helpful to have the data in a format
similar to the following with each piece of data on a separate line and a
colon separating the field name from the data value, order is not important,
I’ll figure out the rest:

Date of test: 11/13/1998
Jurisdiction: Connecticut
Car Model: XJ6 - Federal
Car Year: 1987
Mileage: 104,000 miles
Test Description: treadmill up to 30 mph for 30 seconds (ASM?)
HC Maximum Limit: 137.0 ppm
CO Maximum Limit: 0.87 percent
NO Maximum Limit: 956.0 ppm
HC Test Reading: 5.1 ppm
CO Test Reading: 0.02 percent
NO Test Reading: 260.2 ppm
Equipment Inspection: Catalytic Converter Present
Pass/Fail: Pass
Comments: ppm NO previously failed until new Catalytic Converter installed

Group: anything else we would want to track? If I get any responses, I
will post a summary back to the group.

Hi Paul-

I think this is a great idea. Thanks for volunteering to collect/collate
the data. I’ll send you mine off-list.

Cheers,
Loudon-

At 11:52 -0500 11.17.99, Paul S. Novak wrote:>This emissions thread sure seems to be acquiring a life of its own.

Why don’t we collect (yes I’ll volunteer to collect and collate) data on
testing standards and results by jurisdiction? My last two vehicle
inspection reports
give the maximum measurements and test readings for each
test. If we know what works to achieve a pass of a particular standard, we
will know if we are comparing apples to oranges, or not. As our cats age
and emission standards tighten, passing standards the cars were never
designed for could become a real challenge.

I’d like to see before and after results, if someone fails the first time.
What were the readings, what work (or work around) did they do, and what
were the results.

I think you Jag-Lovers should consider a spot for your results on the web
site.

“Mark 1” Mark Stephenson
1952 XK120 Roadster #673129 (w/XK140 engine and C head)
1958 3.4 Litre Saloon / 1984 XJ6 4.2L / 1985 XJ6 VDP
Jaguar Club of Central Arizona (USA) – www.cableone.net/jcca----- Original Message -----
From: Paul S. Novak psnovak@mail1.nai.net
To: xj-digest@jag-lovers.org
Sent: Wednesday, November 17, 1999 9:52 AM
Subject: [xj] Emissions Testing

This emissions thread sure seems to be acquiring a life of its own.

Remember that different jurisdictions are bound to have different
standards.
What works to pass one test may cause you to fail another. For example,
here in Connecticut, back when only Hydrocarbons (HC) and Carbon Monoxide
(CO) were tested at idle, I have heard that one could detune something (I
forget what) on high-compression engines to the point that the car would
barely run, but it would pass. Now that Nitrous Oxides (NO) are measured,
this method is useless. The Jag mechanic who told me this described
Ferraris stumbling and backfiring their way through the testing lanes, but
passing.

Why don’t we collect (yes I’ll volunteer to collect and collate) data on
testing standards and results by jurisdiction? My last two vehicle
inspection reports
give the maximum measurements and test readings for
each
test. If we know what works to achieve a pass of a particular standard,
we
will know if we are comparing apples to oranges, or not. As our cats age
and emission standards tighten, passing standards the cars were never
designed for could become a real challenge.

Anyone who has any of this info (look at your local version of the vehical
inspection report) can email me off-list at psnovak@ct1.nai.net with
whatever data you have. In case I later decide to automate (in case of a
significant response) it would be helpful to have the data in a format
similar to the following with each piece of data on a separate line and a
colon separating the field name from the data value, order is not
important,
I’ll figure out the rest:

Date of test: 11/13/1998
Jurisdiction: Connecticut
Car Model: XJ6 - Federal
Car Year: 1987
Mileage: 104,000 miles
Test Description: treadmill up to 30 mph for 30 seconds (ASM?)
HC Maximum Limit: 137.0 ppm
CO Maximum Limit: 0.87 percent
NO Maximum Limit: 956.0 ppm
HC Test Reading: 5.1 ppm
CO Test Reading: 0.02 percent
NO Test Reading: 260.2 ppm
Equipment Inspection: Catalytic Converter Present
Pass/Fail: Pass
Comments: ppm NO previously failed until new Catalytic Converter installed

Group: anything else we would want to track? If I get any responses, I
will post a summary back to the group.

Mark, luck be it, I just had our '82 Accord tested today and it failed due to
timing – it was 5deg advanced instead of 12. Timing is actually one of a
dozen or so a test specs in Calif. and it may have caused the HC emissions to
go over the Calif. limits, all of which I forwarded to Paul. I didn’t see the
actual bad reading, but after adjusting just the timing, the old paint was
well under the limits for HC, almost no CO, and no NOx at all. All this
despite it burning more that 1qt/1000mi now. God, I love that car.

Alex
79xj6

Mark Stephenson wrote:

I’d like to see before and after results, if someone fails the first time.
What were the readings, what work (or work around) did they do, and what
were the results.

I think you Jag-Lovers should consider a spot for your results on the web
site.

“Mark 1” Mark Stephenson
1952 XK120 Roadster #673129 (w/XK140 engine and C head)
1958 3.4 Litre Saloon / 1984 XJ6 4.2L / 1985 XJ6 VDP
Jaguar Club of Central Arizona (USA) – www.cableone.net/jcca

----- Original Message -----
From: Paul S. Novak psnovak@mail1.nai.net
To: xj-digest@jag-lovers.org
Sent: Wednesday, November 17, 1999 9:52 AM
Subject: [xj] Emissions Testing

This emissions thread sure seems to be acquiring a life of its own.

[clip]

Why don’t we collect (yes I’ll volunteer to collect and collate) data on
testing standards and results by jurisdiction? My last two vehicle
inspection reports
give the maximum measurements and test readings for
each
test. If we know what works to achieve a pass of a particular standard,
we
will know if we are comparing apples to oranges, or not. As our cats age
and emission standards tighten, passing standards the cars were never
designed for could become a real challenge.

[clip]