XC90 accelerating by itself - Page 2

Clan · Mar 29th, 2015, 18:21

Quote:

Originally Posted by Daveboy

Checked the oil level today. The level is 3/4 of the way up the XXXX... section. i.e. it is sitting between the 2nd and 3rd X from the top. I'm guessing this is ok?

I'm going to get on the phone to Volvo customer service in the morning, and probably submit a report to the DVSA.

yes it seems the oil level is ok .

Orangemoon · Mar 30th, 2015, 19:58

I thought these cars were supposed to be SAFE !!!

Luny · Oct 26th, 2020, 06:12

Sorry to resurrect an old thread, but I just bought a used XC90 and had a very similar unintended acceleration problem on a 2009 D5.

Did this ever get resolved?

Clan · Oct 26th, 2020, 12:44

Quote:

Originally Posted by Luny

Sorry to resurrect an old thread, but I just bought a used XC90 and had a very similar unintended acceleration problem on a 2009 D5.

Did this ever get resolved?

is the Engine oil level too high?

dambat · Oct 27th, 2020, 01:54

Mine did this once in stop/start traffic - it was related to a DPF regen. Was a bit alarming, trying to push me across an intersection, but the brakes held OK, and and it must have regen'd enough that an off-on cycle meant it drove normally from then on.

Clan · Oct 27th, 2020, 10:39

Quote:

Originally Posted by dambat

Mine did this once in stop/start traffic - it was related to a DPF regen. Was a bit alarming, trying to push me across an intersection, but the brakes held OK, and and it must have regen'd enough that an off-on cycle meant it drove normally from then on.

This is nothing to do with regeneration its oil burning in the combustion chamber adding power to the engine ... maybe due to high oil level or internal turbocharger leakage perhaps ..

Tony500 · Oct 27th, 2020, 18:31

What is your driving style at the point of issue? Easy driving or hard driving?

dambat · Oct 27th, 2020, 20:42

If it's fugitive oil in the combustion chamber, switching it off won't stop the engine. Or at least it won't stop cleanly.
My oil/turbo were both fine. This was fairly clearly the engine management system running at a fixed rpm/load.
In any case, it happened once 20,000 km and two years ago, and never again.

XJSDriver · Oct 27th, 2020, 22:12

At the beginning you noticed the engine service message appeared - did the dealer read the fault codes - am wondering if a possible cause might be an issue with the fuel pressure so on occasions too much fuel is being injected i.e. as the amount of fuel injected is dependent on time injector open at a specific fuel pressure, if fuel pressure not steady then possible the fuel injected is out of tolerance?

Oct 27th, 2020, 18:31	#17
Tony500 Master Member Last Online: Jan 7th, 2024 14:02 Join Date: May 2014 Location: Glasgow	What is your driving style at the point of issue? Easy driving or hard driving? __________________ 2009 V70 R-Design 2.0D SE Sport 2007 XC90 D5 SE Lux 2006 XC90 V8 Executive

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Mar 30th, 2015, 19:58	#12
Orangemoon Member Last Online: Nov 6th, 2021 14:50 Join Date: Apr 2012 Location: Neuilly sur Eure	I thought these cars were supposed to be SAFE !!!

Oct 26th, 2020, 06:12	#13
Luny New Member Last Online: May 5th, 2021 09:32 Join Date: Oct 2020 Location: Canberra	Sorry to resurrect an old thread, but I just bought a used XC90 and had a very similar unintended acceleration problem on a 2009 D5. Did this ever get resolved?

Oct 27th, 2020, 01:54	#15
dambat Junior Member Last Online: Yesterday 05:41 Join Date: Aug 2018 Location: Brisbane	Mine did this once in stop/start traffic - it was related to a DPF regen. Was a bit alarming, trying to push me across an intersection, but the brakes held OK, and and it must have regen'd enough that an off-on cycle meant it drove normally from then on.

Oct 27th, 2020, 20:42	#18
dambat Junior Member Last Online: Yesterday 05:41 Join Date: Aug 2018 Location: Brisbane	If it's fugitive oil in the combustion chamber, switching it off won't stop the engine. Or at least it won't stop cleanly. My oil/turbo were both fine. This was fairly clearly the engine management system running at a fixed rpm/load. In any case, it happened once 20,000 km and two years ago, and never again.

Oct 27th, 2020, 22:12	#19
XJSDriver XJS Driver Last Online: Yesterday 18:24 Join Date: Apr 2017 Location: Hitchin	At the beginning you noticed the engine service message appeared - did the dealer read the fault codes - am wondering if a possible cause might be an issue with the fuel pressure so on occasions too much fuel is being injected i.e. as the amount of fuel injected is dependent on time injector open at a specific fuel pressure, if fuel pressure not steady then possible the fuel injected is out of tolerance?

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