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Very minor issue but I'm stumped

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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rmmagow
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Re: Very minor issue but I'm stumped

Post by rmmagow »

I had a similar issue with a non-Volvo. The Idle Air Control Valve was twitching for reasons unknown. A swap with another unit and the problem went away and didn't come back. Could well have been just a dirty connection. I don't know if the Volvos have an IAC but I've had issues with the IAC on a few different makes.
1998 V70 AWD 228K - Daily Driver
1985 Mercedes Benz 300D - 197K Off Road For Now Brakes Failed
1998 S70 135K - FOR SALE
2003 GMC Sonoma - 114K - POS
1958 Mercedes Benz 220S 66K Original and never to be restored.
2006 Saturn ION 5-Speed - 150K Son's weird little easy to fix car

Xilikon
Posts: 218
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Year and Model: 2000 V70 XC SE
Location: Quebec, Canada

Post by Xilikon »

rmmagow wrote:I had a similar issue with a non-Volvo. The Idle Air Control Valve was twitching for reasons unknown. A swap with another unit and the problem went away and didn't come back. Could well have been just a dirty connection. I don't know if the Volvos have an IAC but I've had issues with the IAC on a few different makes.
I don't think a 99 have IAC due to the fact that it has a ETM instead of the old cable-driven throttle body.
2000 V70 XC SE with 150,000 miles, still going great !

JRL
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Post by JRL »

Pretty sure it's an 02 sensor so I will buy a front VOLVO sensor (&*(&*#$^ again)
My price is $200 even... absurd, but aftermarkets don't seem to always work well.
I don't even want to think what retail price is for these but I don't want to do this twice so I'll go with a Volvo sensor the first time

Put it on a scanner and the long term trim is high, (22).
When we reset all the parameters it runs fine (like when the MAF was put in), but I'm sure in a day it will act up again as it adapts.
I am getting not so great mileage and it is running rich, so I'm not going to screw around with this any longer.
The last thing I need is a failed CAT converter!

I guess this will be a Sunday project so I will post back on this by the middle of the week
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2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

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matthew1
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Post by matthew1 »

JRL wrote:not so great mileage and it is running rich
This screams front O2 sensor.
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JRL
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Post by JRL »

Already in my hand
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

JRL
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Post by JRL »

Front sensor didn't do much
Bought a Bosch rear sensor and both small 02 harnesses.
(Something I didn't know is these harnesses do go bad, in fact they come in the box with the rear sensor_!
So far in the driveway it's VERY smooth idling and no idle drop to 700 RPM when blipping the throttle, tomorrow's driving will be the key....
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

JRL
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Post by JRL »

STILL not right!!
ARRGH!!!!! :evil:
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

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Post by jblackburn »

Do 2000's have an idle control valve?

Our 2005 Jeep was doing something pretty similar, and while cleaning the valve worked somewhat, it would still hunt around when pulling up to stoplights and shake a bit. New valve, smooth as...well, not silk - that's one of the roughest engines ever put in a car, but it idles smoothly!
'98 S70 T5
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JRL
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Post by JRL »

Nope
Controlled by the ETM (which also is new)
I'm going to push Volvo for another ETM, this one has 900 miles on it)!
I did what they asked and no change and if anything it's become a hair worse
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

Xilikon
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Year and Model: 2000 V70 XC SE
Location: Quebec, Canada

Post by Xilikon »

JRL wrote:Nope
Controlled by the ETM (which also is new)
I'm going to push Volvo for another ETM, this one has 900 miles on it)!
I did what they asked and no change and if anything it's become a hair worse
If you don't get another ETM for free, why don't you go the Xemodex way ? Less hair pulling imho.
2000 V70 XC SE with 150,000 miles, still going great !

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