Rescuing Geronimo the 2000 V70

[abscate]

What was the verdict on the ps rack, Firefox? Was it a line ( cheap fix) or are the rack seals gone?

[FireFox31]

I’m slowly filling the Maine box with parts again.

I’ve found a bunch of lug nuts with short heads. Rusty but will clean up nicely.
Brake bleeders
I think I have two intake VVT solenoids. Checking part numbers
Coolant reservoir bottle

HVAC damper motor NH…which one do you need? MCC or ECC? Part number best of course

Thanks for continuing to pull parts. How many short head lug bolts do you have? I'll be stopping by a specialty Volvo shop tomorrow to buy any that you don't have.

Thanks for the O2 sensors. How can I tell which is front and rear, and confirm that they work before installing?

I'll have the owner buy Geronimo a nice new coolant bottle as a lower priority. The coolant light is permanently lit on the dash, so I assume it needs a coolant level sensor.

The power steering rack leak must have been from a hard line and gotten patched by the mechanic who did the inspection. The fluid level doesn't seem to be dropping. That's a huge relief and I can check/improve that repair much later.

My car needs the ECC HVAC damper motor for the floor vents. It may be part 9142629 on the left side of the center console, immediately below the left temp motor. Is that same part used for multiple dampers? VIDA gives me code CCM-322 "Air distribution damper motor Active too long" but doesn't tell me the part number.

[abscate]

Your 2000 uses the later air distribution motor which is a single motor driving both sides. There is a chassis break in 1999 for this; I think this is in the bastards thread

Snip

Climate control changes

In late 1998 the damper and temp control modules were replaced by a single motor (9134729)doing both functions on the driver side. This was used 1999-2000 then replaced on P2

Edited to 1999-00

[FireFox31]

Geronimo got new spark plugs today. It had been running rough with pending cylinder 4 misfire codes. The old plugs had some deposits and cylinder 2-3 threads were oil stained from the leaking fill cap gasket.

Cylinder 4 electrode was slick black though its threads were dry. Why might that have happened? How can I prevent it from happening again?

I've attached a picture of the old plugs. I'm interested to know if you see anything which indicates issues I could address. Thanks.

[scot850]

Possible issues are a leaking injector so getting too much fuel or poor ignition so bad/worn plug or cracked/weak coil.

Neil.

[abscate]

Those are so dead I would not try to read anything into them. Wow!

Into the Calgary Box for the next Scottish Boot Sale!

[454cid]

Are these 3-point style plugs what the factory installed? When I pulled mine, I was surprised as I had never seen plugs like this. I was assuming I'd find some standard looking Bosch plug.

[BlackBart]

It's like shaver blades, more is better. I buy the ones with 6 prongs.

[foggydogg]

Geronimo got new spark plugs today. It had been running rough with pending cylinder 4 misfire codes. The old plugs had some deposits and cylinder 2-3 threads were oil stained from the leaking fill cap gasket.

Cylinder 4 electrode was slick black though its threads were dry. Why might that have happened? How can I prevent it from happening again?

I've attached a picture of the old plugs. I'm interested to know if you see anything which indicates issues I could address. Thanks.

There's a chance it's a valve stem seal issue, but I'm with Dr. Abscate on this, drive the fresh plugs long enough to see if it cures the stumble; if so/then go on.

[FireFox31]

Thanks for the input. The cylinder 4 plug fouling coincides with compression test low pressure readings during the first two cranks on that cylinder. I tested the compression 9/2021 before doing any work, with a failed ETM, after the car had sat for 6 months. The pressure readings for each cylinder (rows) for each crank (columns) were:
Cyl 1 2 3 4 max
1 110 145 165 180 190
2 120 165 185 195 200
3 125 165 185 195 200
4 40 135 170 190 200
5 110 150 170 180 185
Here's the video of the cylinder 4 compression test. That first crank sounds so much weaker than every other cylinder's first crank.

Does this low crank and fouled plug suggest any problem with cylinder 4?