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PVC and EGR cleaning now firing on only 4 cylinders

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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ckrussell
Posts: 46
Joined: 23 November 2010
Year and Model: 850 1994
Location: Bethany

PVC and EGR cleaning now firing on only 4 cylinders

Post by ckrussell »

Changed out the pcv separator. All ports looked good. Egr was clean and is functioning. For some reason started her back up and it was running rough. Pulled plug wires one by one and there is a cylinder not firing. I'm thinking maybe I damaged one of the injectors or something....Maybe it got dirt on it...not sure. I have a spare car so I will swap out injector on non-firing cylinder first thing in the morning. Any other ideas
1994 850 N/A 193,000 miles

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rspi
Posts: 7303
Joined: 5 November 2011
Year and Model: 850 T-5R Wagon
Location: Cincinnati OH
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Post by rspi »

Likely an injector problem. Did you pull the fuel rail? If so, pull it again and make sure you didn't loose an injector seal. What codes to you have?
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

ckrussell
Posts: 46
Joined: 23 November 2010
Year and Model: 850 1994
Location: Bethany

Post by ckrussell »

It's not throwing any codes.....Only drove it around a mile. It is getting spark so hope it's a fuel problem. I will pull the fuel rail back off in the morning. All the blue injector seals are present but they also have a small o-ring on them that could've came off.
1994 850 N/A 193,000 miles

User avatar
rspi
Posts: 7303
Joined: 5 November 2011
Year and Model: 850 T-5R Wagon
Location: Cincinnati OH
Has thanked: 34 times
Been thanked: 72 times
Contact:

Post by rspi »

Try reading the port for codes even if you do not see a light.
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

ckrussell
Posts: 46
Joined: 23 November 2010
Year and Model: 850 1994
Location: Bethany

Post by ckrussell »

I can try that. I didn't realize you could do that with no cel. Good to know
1994 850 N/A 193,000 miles

ckrussell
Posts: 46
Joined: 23 November 2010
Year and Model: 850 1994
Location: Bethany

Post by ckrussell »

Note to self...make sure I plug wiring back in that I unplug. #2 cylinder injector was still unplugged
1994 850 N/A 193,000 miles

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