Code P0302 cyl #2 misfire & Code P0300 Multiple cyl misf

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
S70 Guy
Posts: 44
Joined: Fri Nov 11, 2005 4:45 pm
Year and Model:
Location: Ohio

Code P0302 cyl #2 misfire & Code P0300 Multiple cyl misf

Postby S70 Guy » Mon Nov 28, 2005 6:15 pm

Just purchased 98 S70 GLT 145K on it. Had check engine lite on. After replacing a few items the CE would come and go. It was off so I was feeling lucky and went to the E-Check.

Put in before E-Check;
New Battery
Bosh plugs, Wires, Distrib cap and rotor
Replaced air and cabin filter
Bosh fuel filter
Ran a few tanks of 93 octane gas and fuel injector cleaner (pop & pour)

Drove it on highway for 20min
Took it for emisions test and failed.
Gas cap pressure good
Code P0302 cylinder #2 misfire detected
Code P0300 random/multiple cylinder misfire detected

What else could cause misfires like that? Ignition coil ?
Is there a code list somewhere on here?

Thanks in advance.
1998 S70 GLT 145K

1993 850 GLT 172K

White850Turbo
Posts: 923
Joined: Mon Apr 12, 2004 2:13 am
Year and Model:
Location: Plano, TX

Postby White850Turbo » Tue Nov 29, 2005 2:35 pm

It's the crappy Bosch plug wires; they all do that. Replace them with OEM Bougicord and you should be fine.
-Sean

1995 850 Turbo (Extensively Modded)

1998 S70 T5 (Almost Stock)

bigmuse
Posts: 13
Joined: Thu Aug 17, 2006 7:24 pm
Year and Model:
Location:

Postby bigmuse » Thu Aug 17, 2006 7:57 pm

I am having a similar problem. I'm getting an ODBII P0302 code on my car(listed in my sig). I replaced plugs, wires, cords, dist. cap and rotor all about a month ago. Just yesterday my check engine light came on with the P0302. The replacement parts I used are all listed in my sig as well. The plugs were supposedly pre-gapped to the correct specification. Should I try replacing the brand new plug wires as a previous poster mentioned or try something else. How do I tell if the spark plugs are funtioning properly? Shouldn't the bottom of them be gray-ish colored after a couple months use? Will a misfiring cylinder hurt anything? I haven't noticed any difference in performance or anything else. It is idling very smoothly and doesn't appear to be knocking. Please help!!! Thanks.
1998 Volvo S70 B5254FS 93k miles



Recently Replaced Parts:

Yokohama Avid H4S Tires

Bosch Platinum +4 Plugs

Bosch Plug Wires

Bosch Distributor Cap/Rotor

Bosch Front O2 Sensor

Front Engine Mount

User avatar
the underlord
Posts: 68
Joined: Wed Jun 21, 2006 7:40 pm
Year and Model:
Location: Seattle

Postby the underlord » Thu Aug 17, 2006 9:14 pm

don't use platinum plugs..

just go get OEM plugs... that'll fix your problem.

bigmuse
Posts: 13
Joined: Thu Aug 17, 2006 7:24 pm
Year and Model:
Location:

Postby bigmuse » Thu Aug 17, 2006 10:12 pm

thanks, anything else i should check for when i pull the plugs out? are the platinum +4's just bad plugs or my engine doesn't like em?
1998 Volvo S70 B5254FS 93k miles



Recently Replaced Parts:

Yokohama Avid H4S Tires

Bosch Platinum +4 Plugs

Bosch Plug Wires

Bosch Distributor Cap/Rotor

Bosch Front O2 Sensor

Front Engine Mount

User avatar
pfeener
Posts: 634
Joined: Fri Jan 20, 2006 3:04 am
Year and Model:
Location: Massachusetts

Postby pfeener » Thu Aug 17, 2006 10:12 pm

+1 on everything that's been said. Stick with the genuine Volvo plugs and wires. Get the parts from FCPgroton. They have the Volvo plugs and the Bougicord wires are exactly what you would get if you walked into the dealer and pluncked down the big bucks. (and I mean exactly, right down to the stenciling and the Volvo brand name)

bigmuse
Posts: 13
Joined: Thu Aug 17, 2006 7:24 pm
Year and Model:
Location:

Postby bigmuse » Thu Aug 17, 2006 10:24 pm

is there a plug i can get locally at autozone that will be similar to the stock volvo plugs? i'm not having any kind of black exhaust or anything and my car seems to be running better than ever so i dunno. it's an N/A car also, which i have read that the turbos have problems with the platinum plugs. thanks again for the advice guys.
1998 Volvo S70 B5254FS 93k miles



Recently Replaced Parts:

Yokohama Avid H4S Tires

Bosch Platinum +4 Plugs

Bosch Plug Wires

Bosch Distributor Cap/Rotor

Bosch Front O2 Sensor

Front Engine Mount

bigmuse
Posts: 13
Joined: Thu Aug 17, 2006 7:24 pm
Year and Model:
Location:

Postby bigmuse » Thu Aug 17, 2006 10:27 pm

how would i test the wires to see if they are operating to specification? voltmeter?
1998 Volvo S70 B5254FS 93k miles



Recently Replaced Parts:

Yokohama Avid H4S Tires

Bosch Platinum +4 Plugs

Bosch Plug Wires

Bosch Distributor Cap/Rotor

Bosch Front O2 Sensor

Front Engine Mount

bigmuse
Posts: 13
Joined: Thu Aug 17, 2006 7:24 pm
Year and Model:
Location:

Postby bigmuse » Fri Aug 18, 2006 1:25 am

i picked up some ngk v-power. puh-puh-puh-puhlease help me with the other stuff.
1998 Volvo S70 B5254FS 93k miles



Recently Replaced Parts:

Yokohama Avid H4S Tires

Bosch Platinum +4 Plugs

Bosch Plug Wires

Bosch Distributor Cap/Rotor

Bosch Front O2 Sensor

Front Engine Mount

MadeInJapan
MVS Moderator
Posts: 12362
Joined: Thu Mar 31, 2005 2:14 pm
Year and Model: '98 S70 T5
Location: Knoxville, TN American but born in Japan
Flag: United States of America

Postby MadeInJapan » Fri Aug 18, 2006 3:51 am

People here have told you what to get and you go and get something else. What do you expect? The Volvo engines are finicky and don't like certain kinds of plugs. If you can't get the Volvo plugs for some reason, then you can use Bosch Copper plugs FR7DC. In fact, with an N/A engine, that's what I would recommend anyway. Bougicord wires (www.fcpgroton.com is your friend) too.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo


Return to “Volvo 850, S70, V70, C70 & V70-XC Forum (1992-2000)”

Who is online

Users browsing this forum: a73s, Caspar, erikv11, Google Adsense [Bot], LOB, scot850, tryingbe and 51 guests