Our car was towed last week; upon picking it up at the tow yard in Denver, it would only move 20 feet before the engine stalled.
I ordered a new MAF from Penguin Parts and installed it, but the same issue with stalling persisted. Two possible issues from
\reading forum posts. Always use a Bosch MAF. There is probably an issue with a vacuum leak, because a hose is missing from
the pipe downstream from the MAF, as shown it a picture. The underside picture of the engine doesn't show any obvious destinations for where to attach the missing hose. If someone has a suggestion, I'm open to it. Just in case the open port is a problem I can try buying a cover for it.
1998 Volvo V70XC replaced MAF (non-Bosch), drivability issues (stalling out)
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rocky_mtn_man
- Posts: 29
- Joined: 31 December 2013
- Year and Model: XC70 1998
- Location: United States
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abscate
- MVS Moderator
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Look under hood on the right side for a sticker with the vacuum hose routing. They vary between models amd engines in a given year, so you need your diagram. That might be the fuel pressure regulator vacuum supply, needed
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
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erikv11
- Posts: 11800
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- Year and Model: 850, V70, S60R, XC70
- Location: Iowa
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Yes it goes to the fuel pressure regulator but check your sticker to be sure.
See bullet point #3 in this post: viewtopic.php?t=63615
See bullet point #3 in this post: viewtopic.php?t=63615
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
153kgone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
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abscate
- MVS Moderator
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Here is my 1998 turbo sticker.
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
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volvolugnut
- Posts: 6222
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- Year and Model: 2001 V70
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No turbo sticker found.
volvolugnut
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
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
And others.
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wizechatmgr
- Posts: 1798
- Joined: 12 January 2017
- Year and Model: 1999 V70 XC AWD 2.4T
- Location: Albany, NY area
- Has thanked: 45 times
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- Contact:
What happens if you unplug the MAF entirely? Should still start but run really rough.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
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matthew1
- Site Admin
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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
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matthew1
- Site Admin
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@rocky_mtn_man this might match your XC70 https://www.matthewsvolvosite.com/vacuum-lines/
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: 35267
- Joined: 17 February 2013
- Year and Model: 99: V70s S70s,05 V70
- Location: Port Jefferson Long Island NY
- Has thanked: 1497 times
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Its a tough, demanding crowd here....
viewtopic.php?p=669472#p669472
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: 6222
- Joined: 19 January 2014
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 927 times
- Been thanked: 999 times
Old guys with little else to do......abscate wrote: ↑08 Oct 2025, 08:34Its a tough, demanding crowd here....
viewtopic.php?p=669472#p669472
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
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
And others.
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