Well car was running great
Then I noticed it really bogged down wen I put me foot down
So I put in first gear and gradually built power up but it done the same
Wen car stationary it revs perfect with no miss
Any ideas guys
( mod note..fixed title )
1997 v70r if i (accelerate)hard it loses power
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chuffin hell
- Posts: 35
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- Year and Model: volvo v70r
- Location: merseyside
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scot850
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4 culprits come to mind:
1) TCV Valve - these fail with age and the valves in them stick or don't open fully, not allowing full boost.
2) CBV (compressor by-pass Valve) on turbo has a hole in it. Again at that age it is possible. Again, it will not allow it to boost. You can test it by pulling the pipe from the CBV to TCV at the TCV and try and get it to hold a vacuum. If it can't you need to replace it.
3) Fuel pressure is not high enough. This can be tested at the Schraeder valve at the injector rail.
4) Sticking actuator rod on the turbo.
Neil.
1) TCV Valve - these fail with age and the valves in them stick or don't open fully, not allowing full boost.
2) CBV (compressor by-pass Valve) on turbo has a hole in it. Again at that age it is possible. Again, it will not allow it to boost. You can test it by pulling the pipe from the CBV to TCV at the TCV and try and get it to hold a vacuum. If it can't you need to replace it.
3) Fuel pressure is not high enough. This can be tested at the Schraeder valve at the injector rail.
4) Sticking actuator rod on the turbo.
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
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chuffin hell
- Posts: 35
- Joined: 26 April 2015
- Year and Model: volvo v70r
- Location: merseyside
Hi Neil thx for reply wats tcv stand for?
Wat do I need to check fuel pressure?
Thx again adam
Wat do I need to check fuel pressure?
Thx again adam
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scot850
- Posts: 14870
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Hi Adam,
TCV = Turbo Control Valve. This is a little unit normally mounted on the air box of Turbo S/V 70's. Normally on the 'short' side of the box nearest the engine. It has 3 pipe small pipes going into it. The unit measures the vacuum pressure from the engine and calls for more or less pressure from the turbo. If you go to IPDUSA website and look up the HD version they have there is a pdf file there and a video of how it works and how to replace, including diagrams. Another issue can be the 3 pipes that run to this go brittle with age and split. So check them carefully.
Look up on this website. There are special pressure gauges for it. You are looking for 3 bar (43 psi) or higher in a running condition.
Neil.
TCV = Turbo Control Valve. This is a little unit normally mounted on the air box of Turbo S/V 70's. Normally on the 'short' side of the box nearest the engine. It has 3 pipe small pipes going into it. The unit measures the vacuum pressure from the engine and calls for more or less pressure from the turbo. If you go to IPDUSA website and look up the HD version they have there is a pdf file there and a video of how it works and how to replace, including diagrams. Another issue can be the 3 pipes that run to this go brittle with age and split. So check them carefully.
Look up on this website. There are special pressure gauges for it. You are looking for 3 bar (43 psi) or higher in a running condition.
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
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chuffin hell
- Posts: 35
- Joined: 26 April 2015
- Year and Model: volvo v70r
- Location: merseyside
Cheers just ordered fuel filter first on inspection it looks really old
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chuffin hell
- Posts: 35
- Joined: 26 April 2015
- Year and Model: volvo v70r
- Location: merseyside
Well cant find the problem been thru everything
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atucker1
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- Year and Model: 1995 850 Turbo
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Check for boost leaks, and in general any vacuum leaks. If your turbo hoses aren't tightened down they can leak all your boost.
1995 850 Turbo, Sedan
1996 850 N/A, Sedan
1996 850 N/A, Sedan
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chuffin hell
- Posts: 35
- Joined: 26 April 2015
- Year and Model: volvo v70r
- Location: merseyside
Well pipes checked n changed some still the same am puzzled
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FLXC90
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Lambda Light? Any codes? Able to rev except under load, how fresh are your HT leads etc ?
Is this a sudden occurrence, or has performance progressively deteriorated?
Is this a sudden occurrence, or has performance progressively deteriorated?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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chuffin hell
- Posts: 35
- Joined: 26 April 2015
- Year and Model: volvo v70r
- Location: merseyside
Thx for reply
No codes or light
Leads &coil new
It seams too get to boost then die
If I keep my foot down after it losses power it gains power back n then cuts power like a kangaroo
No codes or light
Leads &coil new
It seams too get to boost then die
If I keep my foot down after it losses power it gains power back n then cuts power like a kangaroo
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