1997 Volvo 850 REvening guys having an issue with the old girl, started a while ago as went for the go go pedal hard it seems to misfire as it gets into boost, looked into it changed plugs and rotor cap as well, resealed front pipe as it had a slight blow. Well still does it as boost comes in but will drive lovely with no boost, but as I came home tonight it misses on tickover every two seconds or so not like all the time! Anyone else had summat similar? ?.. was thinking ebc till I found it doing it on tickover, so am now thinking an injector. Any help or experience would help, cheers mick.
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Thread: 855r misfire/misinjection?..
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Wednesday 8th October 2014, 23:19 #1Senior Member
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Thanked 31 Times in 20 Posts855r misfire/misinjection?..
Hlm304 2.5"obx cat back koni fsd's powerflex top mount k&n panel filter v70 rear lights strut brace no fuel and a heavy right boot!!
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Wednesday 8th October 2014, 23:30 #2Senior Member
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Thanked 7,752 Times in 5,648 PostsWhen was the last time the coil was changed? it's just as important as the plugs and leads.
19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...
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Thursday 9th October 2014, 07:42 #3Senior Member
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Thanked 30 Times in 25 PostsThe 850 coil are not known to break down or fail.
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Thursday 9th October 2014, 08:04 #4Senior Member
Still more fettling needed,
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Thanked 4,587 Times in 3,404 PostsNo, but everything has a finite life. You say you changed the plugs and dizzy cap, did you change the rotor arm and leads as well?
Originally Posted by dant5r
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Thursday 9th October 2014, 08:42 #5Senior Member
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Thanked 30 Times in 25 PostsThe 850 coil are not known to break down or fail.
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Thursday 9th October 2014, 08:52 #6Senior Member
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Thanked 7,752 Times in 5,648 Posts Originally Posted by dant5r
Sounds like an automated response Originally Posted by dant5r
Everything fails. It's an old car - who knows how old the coil is?
Shrek's old R used to cough as it came on boost and we pinned it down to the coil breaking down. Ignition faults usually show themselves when the engine comes on load. It's well worth checking because it doesn't matter how new the plugs and leads are if you don't have the power to energise the things in the first place.19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...
310.2bhp / 333ft/lb
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Thursday 9th October 2014, 09:14 #7Ghost Rider
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Thanked 1,921 Times in 1,186 PostsThe coil I had on mine was the original and I was working fine up until I removed for the COP conversion
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
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The Following User Says Thank You to oblark For This Useful Post:
WOODY T5 (Thursday 9th October 2014)
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Thursday 9th October 2014, 09:21 #8Senior Member
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Thanked 7,752 Times in 5,648 PostsBut your car is weird Originally Posted by oblark
The coil I had on mine was the original and I was working fine up until I removed for the COP conversion
19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...
310.2bhp / 333ft/lb
2016 Swedish Day UK "Best Modified Swede"
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Got an old discovery now.
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Thursday 9th October 2014, 09:27 #9Ghost Rider
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Thanked 1,921 Times in 1,186 PostsLikes it owner Originally Posted by M-R-P
But your car is weird
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
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Thursday 9th October 2014, 09:32 #10Senior Member
Still more fettling needed,
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Thanked 4,587 Times in 3,404 PostsI thought you had a MSD blaster coil on yours. Originally Posted by oblark
The coil I had on mine was the original and I was working fine up until I removed for the COP conversion
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Thursday 9th October 2014, 10:14 #11Ghost Rider
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Thanked 1,921 Times in 1,186 PostsI only ran the MSD coil briefly
1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,
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Thursday 9th October 2014, 22:15 #12Senior Member
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Thanked 528 Times in 448 PostsI had a similar problem with my old T5. Changed all the ignition system but the problem remained. My fault was solved after I replaced the cheap pattern fuel pump that I found in the tank !
Old Car: 855 T5 in Grey and rust (dead and gone, well, most of it !
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