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93 850glt

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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robt
Posts: 11
Joined: 14 August 2011
Year and Model: 850glt 1993
Location: tasmania

Re: 93 850glt

Post by robt »

misha wrote:We MUST know if fuel pump is running before the car dies.

My advice is to ask somebody to listen for it's "noise" in the trunk or beside right rear wheel.

When we are sure that fuel pumps is ok,then we can go further.
fuel pump is still running when engine stalls
another thing it does is when i try to restart, it turns over normally then hesitates then turns over but wont start doing it several times while turning key

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misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
Location: Serbia
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Post by misha »

Next thing you need to check is fuel pressure at fuel rail.

Sounds like fuel pressure is low.
'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

robt
Posts: 11
Joined: 14 August 2011
Year and Model: 850glt 1993
Location: tasmania

Post by robt »

misha wrote:Next thing you need to check is fuel pressure at fuel rail.

Sounds like fuel pressure is low.
ok,will try that and let u know,thanks for your help

robt
Posts: 11
Joined: 14 August 2011
Year and Model: 850glt 1993
Location: tasmania

Post by robt »

robt wrote:
misha wrote:Next thing you need to check is fuel pressure at fuel rail.

Sounds like fuel pressure is low.
ok,will try that and let u know,thanks for your help
hi, checked fuel pressure reg, vac line was bad, fixed it now it is ok, i'm hoping that is all it was

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misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 152 times
Been thanked: 402 times

Post by misha »

Well done!

Now...enjoy the ride!:wink:
'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

robt
Posts: 11
Joined: 14 August 2011
Year and Model: 850glt 1993
Location: tasmania

Post by robt »

misha wrote:Well done!

Now...enjoy the ride!:wink:
joy was short lived, still stalling once temp gets to normal. when running prior to warming up i can rev engine without a problem,every thing is normal

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misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 152 times
Been thanked: 402 times

Post by misha »

I would check fuel pump relay.It can make troubles when it become hot.

Still no check engine light?
'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

robt
Posts: 11
Joined: 14 August 2011
Year and Model: 850glt 1993
Location: tasmania

Post by robt »

misha wrote:I would check fuel pump relay.It can make troubles when it become hot.

Still no check engine light?
ok,will try relay, no check engine light

User avatar
misha
Posts: 5379
Joined: 7 December 2008
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 152 times
Been thanked: 402 times

Post by misha »

The only thing that bothers me is that check engine light is not on.It means that there is no problem with sensors,but sounds like its a failing Maf(because it stalls when the engine reach operating temperature).

You must know that even if check engine light is not on,there could be pending codes stored in engine ecu(port A2) & ignition ecu(port A6).I would check those ports again,just to be sure that there are not pending codes stored in ecu's.

There could be a few more things to check....if pending codes are not stored.

How's your battery voltage?Do you have problems like slow cranking when it sits overnight,dimmed headlights?Is alternator voltage in specs(13.5-14.4v)?

There is a "how to" jump a fuel pump relay on the forum somewhere.Try with "search" or simply pm Ozark Lee or Jblackburn for help.
'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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