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

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E Showell
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E Showell

Re: '04 XC Engine Missing -Updated

Post by E Showell » Sun Jun 07, 2020 4:13 pm

Yep, but by me, the black bears could decide they want it.
'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
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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 » Mon Jun 08, 2020 10:41 am

So, intermittent Misfire back today. Spoke with mechanic who suspects two of the new coils could be bad. I'll swap out with some of the old coils and check it out. Failing MAF is also a possibility. Watch this space. I'll keep it updated.
'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: 3146
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
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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 » Mon Jun 08, 2020 3:24 pm

So VIDA had given me misfire and another code ECM 130A - induction leak.

If I have a bad MAF will it give a MAF-specific code, or could the cylinder misfire codes be the only codes I'll ever see?

Here's my issue. Since the misfire is intermittent, if I switch in a couple different coils and it goes away, it could simply be due to the intermittent nature of the fault, not the fact that I put new coils in.
'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: 3146
Joined: Thu Oct 16, 2008 4:00 pm
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Location: Long Valley, N.J.
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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 » Mon Jun 08, 2020 5:03 pm

Switched coil #5 with #1, #4 with #2, no misfires, so either the issue is intermittent, or MAF could be suspect.
'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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Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by abscate » Tue Jun 09, 2020 4:35 am

If we do Hazleton I’ll try find my spare good P2 coils.

With two cylinders misfiring, don’t read too much into that MAF CODE.

IF the car is missing on two, air flow will be crappy and spurious codes will abound.

I don’t think MAF will give misfire like that, coils much more likely. Don’t rule out plugs either. Remember my famous “ one week after out of box “ failure
Empty Nester
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
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Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by 93SCMax » Tue Jun 09, 2020 5:29 am

Just a couple comments to help you (and us) troubleshoot.
1) My original advice about the MAF was only geared toward the "limp home mode", not an intermittent misfire. I'd move on from the MAF at this time.
2) Your 2nd to the last last post mentioned a misfire code...cylinder specific or generic (ie. ECM 3503)? Please list codes after each reappearing failure.
3) If not a specific cylinder, you may have fixed a grounding issue when reinstalling the coils switching cylinders.
4) Did you/your mechanic install Volvo spark plugs? If not, what did you install? As abscate suggested earlier, check the plugs, regap and reinstall, or move to a different plug. I'm a firm believer in only using Volvo plugs if you want long, failure free performance. Cost more but no hassles later.

User avatar
E Showell
Posts: 3146
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 24 times
Been thanked: 73 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 » Tue Jun 09, 2020 8:24 am

Volvo plugs only always.
'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: 3146
Joined: Thu Oct 16, 2008 4:00 pm
Year and Model: V70R '06 AWD Auto
Location: Long Valley, N.J.
Has thanked: 24 times
Been thanked: 73 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 » Tue Jun 09, 2020 11:05 am

Latest update -ECM 91B7 -Throttle Valve, faulty signal. Looks like could be time for a new throttle body, no?

On starting today, rough, lumpy idle with rpm fluctuations, felt like cylinder misses, but no codes for cylinder misfires.

Bad throttle body looks like the issue.
'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
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abscate

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

Post by abscate » Wed Jun 10, 2020 8:45 am

I would still try some coil swaps. Remember that misfire codes have to satisfy software conditions, they aren’t immediate
Empty Nester
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
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boet
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Re: '04 XC Engine Misfiring-Further Updated (Moisture ruled out - possible defective coils, bad MAF)

Post by boet » Wed Jun 10, 2020 10:55 am

Did you change the plug boots along withe thee coils ? I JUST HAD THE SAME PRoblem on# 5 and found out the boot had split around the plug allowing a short to plug hole wall

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