IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

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

User avatar
abscate
MVS Moderator
Posts: 19265
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 234 times
Been thanked: 768 times
Trinidad & Tobago
abscate

1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by abscate » Fri Oct 11, 2019 4:17 am

Preamble, mileage on car 239748

I thought I detected rough running for the last two week at startup and cold idle, but after 60 seconds idle was smooth, so I took no action. I did check #3 plug and found it at 0.032 with some tip wear, and meant to compare it to new, plugs have 24k on them, Volvo OEM style. Coils estimated to be 80k miles, OEM Bosch

Leaving downtown ROCHESTER, two hours after a long drive, I had a missing cylinder, low power, and bad exhaust smell. It cleared after 5 minutes of driving to my next destination. I then headed out 490 towards Buffalo, and the miss returned with a CEL.

The incident

I was able to reach my ObD in the glove box and read codes, and had two...P0352 #2 coil primary failure and #2 misfire P0302

The repair

I pulled over, T25 for cover, M6 for coil screw, spare coil from parts kit, installed and miss cleared. I will test today on the drive home.

Waze told me instead of being 15 minutes early to my next destination, I was now only 8 minutes early. I lost one minute saying hello to the guy who pulled over to help in the first 30 seconds. It’s A Buffalo thing.

Analysis
Relatively early coil failure. I will order a replacement but have to think about replacing other four coils. This same repair on the GW would suck.
You do not have the required permissions to view the files attached to this post.
These users thanked the author abscate for the post:
Cees Klumper


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
dalel
Posts: 35
Joined: Wed Dec 13, 2017 2:46 pm
Year and Model: 1998 V70
Location: Louisville
Has thanked: 4 times
Been thanked: 2 times
United States of America
dalel

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by dalel » Fri Oct 11, 2019 10:43 am

Thank God you keep a spare acorn on the instrument panel.



User avatar
abscate
MVS Moderator
Posts: 19265
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 234 times
Been thanked: 768 times
Trinidad & Tobago
abscate

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by abscate » Fri Oct 11, 2019 2:32 pm

You have to have nuts to drive these cars


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
wizechatmgr
Posts: 1281
Joined: Thu Jan 12, 2017 1:07 pm
Year and Model: 1999 V70 XC AWD 2.4T
Location: Albany, NY area
Has thanked: 22 times
Been thanked: 53 times
Contact:
United States of America
wizechatmgr

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by wizechatmgr » Fri Oct 11, 2019 9:09 pm

I have 5 cheap "don't want to know" brand coils currently running on mine that were made in Japan. I have my orig. 5 as well. Suffice it to say everything checks out at this point. If you ever need one, hit me up.

My daughters were coloring the acorns the other day. Whatever kept them occupied was a good deal =)
Thanks again!


Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD - ~183k miles

User avatar
abscate
MVS Moderator
Posts: 19265
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 234 times
Been thanked: 768 times
Trinidad & Tobago
abscate

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by abscate » Sat Oct 12, 2019 3:43 am

Love those kids.

Yes, it’s the car that loves me by breaking down on the wide shoulder of I490 on a beautiful fall sunny day with minimal traffic and says “ please put in that spare part you are carrying for me”

Drove from BUF to ITH to ALB with no misfires


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: 19265
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 234 times
Been thanked: 768 times
Trinidad & Tobago
abscate

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by abscate » Tue Nov 05, 2019 4:03 pm

700 miles later, problem has returned. Misfire reported on cylinder 2 with two codes. P0302 and P0352 ( coil primary failure)

I’m guessing the coil wiring has gone bad, it misfires at idle and low load, and then clears up at cruise rpm of 2000-2500

I did swap in another used coil and it did not help


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: 19265
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 234 times
Been thanked: 768 times
Trinidad & Tobago
abscate

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by abscate » Wed Nov 06, 2019 11:23 am

Well this one turned out to be an epic troubleshooting thread. Stand by for the read of the week.


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
Clemens
Posts: 1064
Joined: Thu Sep 03, 2015 12:34 pm
Year and Model: 96 855 R + 94 855 T5
Location: Austria
Has thanked: 73 times
Been thanked: 40 times
Austria
Clemens

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by Clemens » Wed Nov 06, 2019 1:17 pm

I was born being on standby ...


Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

User avatar
abscate
MVS Moderator
Posts: 19265
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 234 times
Been thanked: 768 times
Trinidad & Tobago
abscate

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by abscate » Thu Nov 07, 2019 5:21 am

Recap: I had a symptomatic slight miss at idle, which turned into a constant miss at speed, pulled over on highway, replaced with used coil, all well. Cylinder 2 code misfire popped, and coil 2 replaced.

Once home, I pulled plugs, checked coil bolt tightness, changed plugs for Volvo ones (24k on old)all well

Drove two trips to Boston and one to NJ, total about 900 miles, no problems,

Departing on trip, constant misfire came back at idle and medium load, car runs on 5 at speed with occasional misfire. Flashing CEL light, exhaust smell, and P0302 Po352 codes set.

Bachelors level troubleshooting
Replaced coil with tested spare, did not solve problem. Took car home and took P2

Masters level Troubleshooting
Started car, smooth idle
As car warms, miss in cylinder 2 develops. As I manipulate wires, which are in medium condition, I seem to generate/ stop miss but it is not definitive. I am unconvinced it is a wiring fault in the harness. We swap coils 1 and 2 and problem does not move.

PhD troubleshooting
When you get stuck, you go full bore diagnostic
Step 1: Ignore prior history and get the data

I will put the solution 20 lines down in tiny type for those who don’t like puzzles, for those wishing to test their skills , see poll

STOP HERE IF YOU WANT TO HONE SKILLS and go to poll here.





















the key here was ignoring prior history. It turned out one of my brand new Volvo spark plugs from FCP would misfire when hot. The original failure from two weeks ago was coil, and this failure was brand new out of box quality issue with a Volvo part. We were able to confirm by reinstalling plug and duplicating fault. The old plug did notmisfore up to 6000 rpm.


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

scot850
Posts: 5597
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 9 times
Been thanked: 151 times
Canada
scot850

Re: 1999 T5V70M56 road incident report, misfiring [ bad #2 coil]

Post by scot850 » Thu Nov 07, 2019 10:06 am

Not a common issue but over many years I have had maybe 3 bad out the box spark plugs. 1 was Volvo OE and others were OEM Bosch.

Strange that it happened in the same cylinder. Wete the plugs fitted at same time as the new coils?

Similarly had a new Volvo branded coil go out on the V70 base I renovated. Coils were bought from an on line supplier but not a Volvo dealership. Maybe some hokey Volvo parts out there or diminished OE quality as I have speculated before.

If plugs were replaced at same time as new coils, maybe one or other was bad and took the other out. As you have said many times. If it worked fine before you worked on it then check the work/parts you changed. Well done finding the issue all the same!

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

Post Reply
  • Similar Topics
    Replies
    Views
    Last post