High NOx fails emissions but no codes - 1997 850 R
-
abscate
- MVS Moderator
- Posts: 36138
- Joined: 17 Feb 2013, 17:54
- Year and Model: 99: V70s S70s,05 V70
- Location: Port Jefferson Long Island NY
- Has thanked: 1609 times
- Been thanked: 4064 times
Hide your spare change and used oil when Abscate visits…
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
-
matthew1
- Site Admin
- Posts: 14799
- Joined: 14 Sep 2002, 11:03
- Year and Model: 850 T5, 1997
- Location: Denver, Colorado, US
- Has thanked: 2854 times
- Been thanked: 1332 times
- Contact:
Pass 
- IMG_1813.jpeg (201.83 KiB) Viewed 532 times
- IMG_1815.jpeg (288.18 KiB) Viewed 532 times
- IMG_1814.jpeg (212.58 KiB) Viewed 532 times
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a cut!
1998 V70, no dash lights on
1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace
2004 V70 R [gone]
How to Thank someone for their post
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a cut!
1998 V70, no dash lights on
1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace
2004 V70 R [gone]
How to Thank someone for their post
-
abscate
- MVS Moderator
- Posts: 36138
- Joined: 17 Feb 2013, 17:54
- Year and Model: 99: V70s S70s,05 V70
- Location: Port Jefferson Long Island NY
- Has thanked: 1609 times
- Been thanked: 4064 times
Nice hot run before testing??
GReen
GReen
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
-
454cid
- Posts: 1279
- Joined: 06 Jan 2022, 19:57
- Year and Model: 1996 850
- Location: United States
- Has thanked: 151 times
- Been thanked: 139 times
Great to hear! Obviously the CO is good, but the others are approaching the limit.... is that about normal, or are they borderline? I'm not from an emissions testing state, so I don't have any idea what is typical.
1996 850
1999 S70 GLT (sold after deer hit)
2010 Ford Focus SE
2006 Cadillac CTS
1996 Mercedes C220
1999 Chevrolet K3500
1969 Buick LeSabre Custom 400
1999 S70 GLT (sold after deer hit)
2010 Ford Focus SE
2006 Cadillac CTS
1996 Mercedes C220
1999 Chevrolet K3500
1969 Buick LeSabre Custom 400
-
scot850
- Posts: 15483
- Joined: 05 Apr 2010, 14:46
- Year and Model: 2000 V70 R
- Location: Calgary, Alberta, Canada
- Has thanked: 2197 times
- Been thanked: 1851 times
That is great news! Was it a good burn out that fixed it?
Neil.
Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold
-
matthew1
- Site Admin
- Posts: 14799
- Joined: 14 Sep 2002, 11:03
- Year and Model: 850 T5, 1997
- Location: Denver, Colorado, US
- Has thanked: 2854 times
- Been thanked: 1332 times
- Contact:
I wish I had my OG 850 T-5 emissions printout for comparison. I looked for it in my posts here but I don't think I uploaded it. Short answer, I don't know.454cid wrote: 05 Feb 2026, 14:40 Great to hear! Obviously the CO is good, but the others are approaching the limit.... is that about normal, or are they borderline? I'm not from an emissions testing state, so I don't have any idea what is typical.
Driving the cobwebs out of it around 3x per week for weeks, then rolling in hot to the testing station today. And fuel treatment... not Seafoam but a more grocery store brand like STP.
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a cut!
1998 V70, no dash lights on
1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace
2004 V70 R [gone]
How to Thank someone for their post
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a cut!
1998 V70, no dash lights on
1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace
2004 V70 R [gone]
How to Thank someone for their post
-
scot850
- Posts: 15483
- Joined: 05 Apr 2010, 14:46
- Year and Model: 2000 V70 R
- Location: Calgary, Alberta, Canada
- Has thanked: 2197 times
- Been thanked: 1851 times
I guess we should not question the Volvo Gods.........! 
Neil.
Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold
-
matthew1
- Site Admin
- Posts: 14799
- Joined: 14 Sep 2002, 11:03
- Year and Model: 850 T5, 1997
- Location: Denver, Colorado, US
- Has thanked: 2854 times
- Been thanked: 1332 times
- Contact:
I don’t. I didn’t make the rules, I just follow them, for instance MVS stickers aren’t likely to increase the chances of fixing a problem, but they can’t hurt.
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a cut!
1998 V70, no dash lights on
1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace
2004 V70 R [gone]
How to Thank someone for their post
Also -> Amazon link. Click that when you go to buy something on Amazon and MVS gets a cut!
1998 V70, no dash lights on
1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace
2004 V70 R [gone]
How to Thank someone for their post
-
abscate
- MVS Moderator
- Posts: 36138
- Joined: 17 Feb 2013, 17:54
- Year and Model: 99: V70s S70s,05 V70
- Location: Port Jefferson Long Island NY
- Has thanked: 1609 times
- Been thanked: 4064 times
I will guess you ran a bit richer on test2.
Note that you lifted HC from less than half spec to 3/4 spec
That lowered combustion temps which plummets NOx
Your cat cleaned up the HC so you still passed
Note that you lifted HC from less than half spec to 3/4 spec
That lowered combustion temps which plummets NOx
Your cat cleaned up the HC so you still passed
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
-
volvolugnut
- Posts: 6500
- Joined: 19 Jan 2014, 09:51
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 987 times
- Been thanked: 1075 times
"Driving the cobwebs out of it around 3x per week"
Fun repair work!
volvolugnutr
Fun repair work!
volvolugnutr
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
John Deere 214 lawn tractor about 1977 model
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
John Deere 214 lawn tractor about 1977 model
And others.
-
- Similar Topics
- Replies
- Views
- Last post