I would swap another ECC because it's quick and easy. It could be the problem but if nothing else would rule it out. The damper motors are hard to access. This illustration shows where they are. I found it in this thread https://www.matthewsvolvosite.com/forums/viewtopic.php?t=50525&p=251432 He ...

Was it a Siberian market filter for cold weather?

A Dremel might run faster?

wizechatmgr wrote: ↑03 Oct 2019, 16:08 I've been getting good ones on eBay for $20-$50 each. Last about a year or two typically.

How long do the bad ones last?

Wait until the Siberian winter hits

If you have good 12.6V lets leave the battery alone for now, and find where your 12V is getting lost (other thread)

Misha is used to those cold Siberian winters where Huskies huddle under your car to warm it up.

It's easier to buy VOL-FCR and to read codes from tcm. Like i said....they won't go by themselves if not read and cleared unlike to ecu or abs unit. Misha, you were spot on. I sent my TCM to G7 computers in New York for them to look at it. They said that their is no hardware issue...only software. ...

Thanks to Misha as well

Partly because they were, and are, a great car.

I missed this They spent several hours diagnosing and found: no power to the injectors when cranking. Fuel pressure is good, but no spark. They found they can easily push start the car and it reliably starts immediately. They went through every sensor, all grounds, the ignition switch, checked all o...