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2001 V70XC - Random stall when coming to a stop... Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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2001 V70XC - Random stall when coming to a stop...

Post by xHeart » Tue Jan 08, 2019 6:34 pm

Would servicing fuel rail result in air pockets in fuel injection?

Recent maintenance https://www.matthewsvolvosite.com/forum ... =9&t=61449 included replacing fuel filter, servicing fuel rail and replacing injector o'rings. Surge was present few times as if there was ghost on gas pedal.

Is there a procedure similar to those after steering fluid, trans fluid, and coolant?


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by XC70Rider » Tue Jan 08, 2019 9:12 pm

No service necessary when messing with the fuel rail. The fuel pump will exclude air within a few seconds.

Since you cleaned the PCV system I would check for vacuum leaks. Hook up VIDA and search for DTCs and the AFR.



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Re: 2001 V70XC - Random stall when coming to a stop...

Post by xHeart » Thu Jan 10, 2019 9:40 am

No CEL at this time, but orange triangle has lit up with message "Engine Service Required".

Debugging VIDA/DiCE.


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by abscate » Thu Jan 10, 2019 10:20 am

That little idle wobble Is typical of a vacuum leak somewhere.

The other horrifying possibility is I believe you are blessed with the sexy MM Italian throttle body


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by xHeart » Thu Jan 10, 2019 11:00 am

abscate wrote:
Thu Jan 10, 2019 10:20 am
That little idle wobble Is typical of a vacuum leak somewhere.

The other horrifying possibility is I believe you are blessed with the sexy MM Italian throttle body
There is/was a wobble, idling near 700RPM mark.
It is sexy and clean MM. I removed it to clean and replaced gasket. Carefully compared gaskets before putting new on.

Does it mean running an ETM test once (insert F word here) VIDA/DiCE get with the program?


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by EngineeringBloke » Thu Jan 10, 2019 2:15 pm

2001 MM ETMs were troubled. The resistive track that is used to report where the throttle plate is positioned would wear over time. When the throttle was in common positions, those positions would wear more.

When the engine computer could not see the throttle position, it could shut down the throttle which is very dangerous, if you were trying to turn left across traffic and the engine suddenly slowed, for example.

https://www.matthewsvolvosite.com/forum ... hp?t=17252

Xemodex repairs/replaces them. Hope it is something else as this is not the cheapest part.



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Re: 2001 V70XC - Random stall when coming to a stop...

Post by abscate » Thu Jan 10, 2019 3:16 pm

You get about 10,000 miles of warning before it goes to limp mode.

If you drive around with ECM throttle body codes and/or ETS lights on, that’s your warning.


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by xHeart » Sun Jan 13, 2019 7:34 pm

The original MM was replace around 146,000 miles. This is yellow label.
At surge while idling the angle goes above 7.xxº, then it drops to following. It does not stall but struggles a little while idling.
MVS_ETM_2880.jpg
MVS_ETM_2880.jpg (269.79 KiB) Viewed 404 times


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by abscate » Mon Jan 14, 2019 4:47 am

Was the ETM new or used? The yellow labels fail exactly the same as white, so if it's coming up in 125k it's due again.

That throttle angle seems low for idle, I thought mine sits at 5-8%


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Re: 2001 V70XC - Random stall when coming to a stop...

Post by xHeart » Mon Jan 14, 2019 8:09 am

abscate wrote:
Mon Jan 14, 2019 4:47 am
Was the ETM new or used? The yellow labels fail exactly the same as white, so if it's coming up in 125k it's due again.

That throttle angle seems low for idle, I thought mine sits at 5-8%
Unless we've more data from others, a 5-8º will be around 1500RPM. Our XC70 always idles between 640-680RPM.

ETM was new this time five years ago (Jan 2014) , so it now has 44,000 miles on it.
While live, throttle angle hovers little above 2.xxº in my situation.
Unless there is more under ECM, I'll capture live ETM data on all parameters and share it.


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Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
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