2001 V70 2.4T bad ignition coil replacement...

[E170_Driver]

On my continued quest of what seems to replace every single part on my 2001 V70, the love/hate relationship is developing into getting to know this vehicle better by the day. I was trying to focus on replacing a light bulb in my temperature control unit on the lower dashboard, when I started the car to let it warm up after sitting out in the cold for a couple of days. It was very obvious that something was not right; the engine ran rough, the steering wheel was shaking and the CEL came on blinking. To me it felt like one of the cylinders was not firing and plugging in the code reader confirmed my suspicion…P0305 “Cylinder 5 Misfire Detected”. OUCH

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My diagnosis after some thorough reading upon the problem was either a bad spark plug (unlikely) or a bad ignition coil. I crossed my fingers while calling around town and sure enough with lots of luck a local auto parts store here in Somerset, KY had one OE ignition coil in stock (why, I have no idea; even the store clerk was very surprised). In addition I purchased a single Champion 7071 double platinum spark plug for a total of $77. Tools required were two torx bits (sizes T25 for the screws on the turbo air delivery line and T30 for the cover screws), 10mm socket for the screw that holds the coil in place on the engine block, 5/8’ spark plug socket, a flat head screw driver to disconnect the electrical connection to the coil and some anti seize lubricant.

To start the process one needs to remove the two screws on the turbo air delivery unit in order to remove the plastic cover easier…

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…and then the torx screws on top of the plastic covers.

First take the oil cap off. Be careful not to damage/pinch any electrical wires while removing the covers. Then replace the oil cap so nothing can accidentally slip in.

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Then I removed the electrical connection from the top of the ignition coil by carefully raising the plastic clip with a flat head screw driver.

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In my case it was the #5 cylinder, which is the one on the very right. I removed the screw holding the coil into place on top of the engine block…

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..and then pulled the bad unit out.

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Next was the spark plug, which when removed showed very clearly that it was exposed to a lot of fuel but no fire (btw the plug were replaced only about 5,000 miles ago)…notice the black unburned fuel.

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A look into the cylinder also shows plenty of moisture, but no fire (one needs to look very closely)…

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Some anti seize on the new spark plug…

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…place it on the spark plug socket…

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…and then screw the plug back in carefully not to over torque…

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…there you go, new spark plug is in place.

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Vertically place the new coil on the new spark plug…

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…and watch any electrically wires while screwing the coil into place…

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…then plug the electrical connection back in.

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Before placing the plastic covers on top the engine here comes the moment of truth…

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FIXED…….YEAH


Place the covers back into place and remember the torx screws on the turbo air delivery unit.

When I first realized that the engine was not running right I thought this can’t be good. But by doing some research upon the topic, especially reading this website it became very evident what the problem might be and that I could get this fixed doing the maintenance myself. Once again thanks much MVS in helping me keeping this vehicle running and as always the 2001 does not let me down in providing valuable information to others. The love/hate relationship continues.

On to Indianapolis and another 500 miles tomorrow morning.


Jan

[billofdurham]

A very good write up and the photos are a great help. This is going into the Repair Database.

Bill.

[E170_Driver]

And to end this (now) great day on a positive note, I cleaned her all up from the salt and mud she picked up over the last month or so...


Thanks for carrying me safely to/from work beautiful big BLUE...

Jan

[SilverS70]

Nice write up, thanks. Interesting to note that the old coil #9125601, and the new coil #30713419 are interchangeable. I thought they might be different.

Two of my coils have tiny cracks in them, but no misfires(yet) and I carry a used coil and tools in the trunk.

I also noticed a negative clamp on the motor mount, were you charging your battery? Thanks again, good write up with great pics.

[E170_Driver]

That was a good observation SilverS70 and to be honest I did not look at the old coil that closely only that the new coincides with the OEM # that FCPGROTEN has on their website:

http://www.fcpgroton.com/product-exec/p ... ory_id/111

The clamps are for a light that I use when working under hood; it has a positive and negative clamp, quite the useful tool.

Jan

[Georgeandkira]

Hello, When I first changed my plugs I feared that the wiring of the coils would be dry and cracked. I called a local parts place just to make sure they were available quickly. The man said "We stock them and I've never sold one". The wiring was of the highest quality and looked new. Only the split, black plastic conduit was a little cooked. Kira

[jjaV70T]

I have a 03.V70 and have replaced 4 coil packs. These coil packs get HOT and are covered..BEST!

[VCA]

Nice write up, thanks. Interesting to note that the old coil #9125601, and the new coil #30713419 are interchangeable. I thought they might be different.

VIDA confirms that 9125601 was superseded by 30713416.

[apollo5]

Nice write up.
How did you know it was the #5 coil and not something else causing the misfire or did you just chalk it up to spending the $77 as step one?

I had the same code and Btw, new plugs less than 300 miles b4 problem, new injectors after code with no change, new frt o2 sensor after with n/change, swapped coils to see if code would switch to #4 misfire- no change, checked plugs and all still good. Down to thinking it' may be bad(clogged) CAT. What's your thoughts? Don't mind replacing parts that are sure overdue for replacement 130k, but not all at one time.

[E170_Driver]

Nice write up.
How did you know it was the #5 coil and not something else causing the misfire or did you just chalk it up to spending the $77 as step one?

I had the same code and Btw, new plugs less than 300 miles b4 problem, new injectors after code with no change, new frt o2 sensor after with n/change, swapped coils to see if code would switch to #4 misfire- no change, checked plugs and all still good. Down to thinking it' may be bad(clogged) CAT. What's your thoughts? Don't mind replacing parts that are sure overdue for replacement 130k, but not all at one time.

Well, I just replaced the spark plugs 5,000 miles ago and took it for granted that the plug was still working correctly. I checked for proper link up from the electrical connection to the coil and then to the plug itself; something was no good. I did not want to mess around with the injector (possibly blocked) and therefore the process of elimination got me to the coil. The unit was slightly cracked (so are two others) and I made the decision to spend the money for a new one. Check your wires leading to the coil...when I had my oil leak last weak I found 4 wires exposed, maybe there is some sort of arcing taking place...!!!

Jan