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'04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF) Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
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E Showell
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Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by E Showell » Tue Jun 16, 2020 8:50 am

Chris -- have not tried reseating the ECM.

Battery holding at 13.03 V after overnight 10 amp charge and 2 + hours off the charger. Ambient temp. around 72°F.

I'll hook it up and go for broke.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)

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E Showell
Posts: 3173
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 35 times
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Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by E Showell » Tue Jun 16, 2020 12:41 pm

I don't know what to believe. VIDA read battery voltage at one point after the charge to 13V at 10.something volts. Multimeter said 12.7. Five months short of sell by date on a 60 month battery. I'm thinking I should just replace it and take battery out of the equation since it will probably die over the winter anyway.
Last edited by E Showell on Tue Jun 16, 2020 1:32 pm, edited 2 times in total.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)

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abscate
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abscate

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by abscate » Tue Jun 16, 2020 1:01 pm

I’m not sure where VIDA is reading but you might check wiring and primary circuit cables for corrosion,

Remember the battery makes it’s presence known down at the starter so , after disconnecting the negative, remove and clean those terminals until they are shiny and bright and clean
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E Showell
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

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E Showell
Posts: 3173
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 35 times
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E Showell

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by E Showell » Tue Jun 16, 2020 6:36 pm

Well, it isn't the battery.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)

User avatar
abscate
MVS Moderator
Posts: 21976
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 363 times
Been thanked: 1112 times
Trinidad & Tobago
abscate

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by abscate » Tue Jun 16, 2020 6:53 pm

Grounds important too. Sean had horrible throttle body codes with a loose ground.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
abscate
MVS Moderator
Posts: 21976
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 363 times
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Trinidad & Tobago
abscate

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by abscate » Wed Jun 17, 2020 4:21 am

It’s a new day. Do you have a fuel pressure gauge? Time to forget about the past, and go full troubleshooting mode.

Ignition stuff is pretty new, so let’s measure the fuel pressure at the rail.

If you find that remote mechanic coming to do your timing belt , if s/he is at all competent, s/he will have a fuel pressure gauge

Pop open your air cleaner and see if a Jersey rats took up residence during Covid days.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
E Showell
Posts: 3173
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 35 times
Been thanked: 76 times
United States of America
E Showell

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by E Showell » Wed Jun 17, 2020 5:58 am

Air cleaner is due for replacement. FCP replacement arriving today/tomorrow. Vacuumed inside of air box. Don't have a fuel pressure gauge. Could be failing fuel pump, but my prior experience with those is binary failure, i.e., it either works or doesn't all of a sudden.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)

User avatar
abscate
MVS Moderator
Posts: 21976
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 363 times
Been thanked: 1112 times
Trinidad & Tobago
abscate

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by abscate » Wed Jun 17, 2020 10:07 am

Not on a P2. Whethe PEM acts up, I had six months of occasional stumble, then finally a no start.

Fuel pressure tells tale.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

User avatar
E Showell
Posts: 3173
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 35 times
Been thanked: 76 times
United States of America
E Showell

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by E Showell » Wed Jun 17, 2020 11:00 am

I have a spare PEM somewhere. Just have to locate it, and location on vehicle. Never even considered failing PEM. Thanks for that suggestion.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)

User avatar
E Showell
Posts: 3173
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 35 times
Been thanked: 76 times
United States of America
E Showell

Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by E Showell » Wed Jun 17, 2020 12:24 pm

Would a bad fuel pressure sensor give me a CEL and/or DTC?
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
'04 XC70 Ruby Red Metallic
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)

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