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Hesitation on WOT (V70 2.0 T5 AWD 1997) Topic is solved

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Fiodor
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Year and Model: 1997 V70 2.0 T5 AWD
Location: Reims
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Re: Hesitation on WOT (V70 2.0 T5 AWD 1997)

Post by Fiodor »

Update : I've noticed that my car stumbles at idle. It's not new but I considered it as normal behaviour before and I think it might be part of the symptoms. And unplugging the MAF doesn't change anything regarding the idle stumble.
I've also noticed that the 5th cylinder's "plug hole " is very dirty compared to the others. I don't know if it could be related.
I haven't done the PCV but the glove test and the dipstick test were both negative.
1997 V70 T5 2.0 AWD with welded angle gear at 240k km
1990 740 Break (dead)

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misha
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Year and Model: '97 850 2.5 20v
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Post by misha »

What you mean by dirty?
Covered with oil?
When spark plug is removed or not?
Besides the sp.hole....is spark plug on that cylinder also dirtier than others?

What about oil consumption on 1000km or between changes?How much?
After a short drive in high rpm...they ALL should look dry and light grey(the electrode and prongs).
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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Fiodor
Posts: 141
Joined: 17 October 2017
Year and Model: 1997 V70 2.0 T5 AWD
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Post by Fiodor »

Update!
After replacing the spark plugs with volvo OEM and the ignition wires with Bougicord my problems are now gone!
No misfire at idle and a smooth acceleration.
Thanks for your help!
1997 V70 T5 2.0 AWD with welded angle gear at 240k km
1990 740 Break (dead)

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abscate
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Year and Model: 99: V70s S70s,05 V70
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Post by abscate »

Volvo horns to misha, with a small set to me...

Another one solved by Volvo plugs and Bougicord wires.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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