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Fuel dumping

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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chris_s
Posts: 3
Joined: 20 January 2013
Year and Model: 1995 854T
Location: chicago burbs

Fuel dumping

Post by chris_s »

Some help please. I have been working on my 95 850T for several months now. Won't start. Has spark and fuel. Pulled the plugs, all very wet. Turned engine over with starter, liquid fuel blows out of #4 cylinder. Dried plugs, blew out cylinders, pulled #2 fuse (fuel pump). turned the key and cranked it, pop'd ran for a few and died. cranked it again ran & died. Replaced fuse cranked, nothing again. Pulled plugs and they were soaked again, #4 had a lot of liquid in it again. Are the injectors stuck open or what else controls them? Thanks for any help in advance.
Chris

jblackburn
MVS Moderator
Posts: 14043
Joined: 8 June 2008
Year and Model: 1998 S70 T5
Location: Alexandria, VA
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Post by jblackburn »

Yeah, it sounds like #4 has a stuck-open injector.

The injectors are controlled by a signal from the cam position sensor and the grey fuel injector relay on the fan shroud. If you think they are all still stuck open after replacing/cleaning #4, I'd start my investigation with the relay.
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

boosted5cyl
Posts: 1100
Joined: 29 January 2010
Year and Model: '98 V70 T5, '99 S80
Location: St. Paul, MN
Been thanked: 1 time

Post by boosted5cyl »

Why not swap injectors #3 and #4 and see if the flooding moves with the injector?
'04 XC90 2.5T AWD (Angus) 134K.
'99 S80 T6 (Medusa) 214k. On borrowed time LOL
'98 V70 T5 (Vivienne). RIP @ 228K. Spun rod bearings.

chris_s
Posts: 3
Joined: 20 January 2013
Year and Model: 1995 854T
Location: chicago burbs

Post by chris_s »

Thank for the advice. Pulled the rail and injectors out. Really gummed up. Cleaned them very well. New o-ring kit. Problem is now I can't get any of them to go back into the manifold. They jusy feel way too tight. Any trick for getting them back in. Read just about every post on injectors and seems no one else has had this problen.
Thanks, Chris.

t5henry
Posts: 2
Joined: 15 June 2024
Year and Model: 2005 S40
Location: Wisconsin

Post by t5henry »

Hey Chris, wondering if you have any updates. I’m having the same problem and am completely lost. I want to know if cleaning the injectors worked

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