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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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2008 4.4 v8Views : 657 Replies : 6Users Viewing This Thread : |
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Nov 23rd, 2021, 18:27 | #1 |
ian ferguson
Last Online: Apr 4th, 2024 16:13
Join Date: Aug 2006
Location: London
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2008 4.4 v8
Hi, Since it's got colder, two mornings in a row when i start the car it's really lumpy, like it's not firing on all cylinders, then after 2 or 3 minutes it's OK, the second morning it took a little longer. Has anyone experienced this. Ian
Should mention it's dual fuel Petrol / LPG. although it starts on Petrol. Last edited by ian ferguson; Nov 23rd, 2021 at 18:32. |
Nov 23rd, 2021, 21:43 | #2 |
Junior Member
Last Online: Dec 5th, 2023 10:19
Join Date: Dec 2020
Location: Exeter
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It maybe have something to do with fuel pressure.
I recently had a high pressure fuel pump fault with my 4.4 v8 LPG Prins. It ran rough with starts then would sometimes die after a few sec. other times not. if this could be of use , i'll provide more info. It has been mentioned about a fuel return line. (im still investigating this) I'll refer u to link. |
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Nov 25th, 2021, 09:24 | #3 |
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Last Online: Oct 7th, 2023 14:41
Join Date: Apr 2013
Location: UK
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On diesels when this happens, often a new fuel filter cures it.(Normally an 'engine warning light' comes up on the D5S engine) Worth a try if filter not changed for a while?
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Nov 25th, 2021, 11:26 | #4 |
Master Member
Last Online: Apr 30th, 2024 09:35
Join Date: Sep 2017
Location: Norfolk
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Sounds like a good time to invest in VIDA/DICE. This diagnostic tool would allow you not only to check for potential sensor issues but also to measure fuel pressure in real time.
Also, do you know when the spark plugs were last changed? If they've been missed by the previous owners for some time (i.e. 'essential' rather than scheduled services being carried out) they might be in poor condition and hence giving poor performance when cold.
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2007 XC90 V8 Sport |
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Nov 25th, 2021, 16:32 | #5 |
ian ferguson
Last Online: Apr 4th, 2024 16:13
Join Date: Aug 2006
Location: London
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Hi, It was ok yesterday morning, but this morning it was lumpy for about a minute then OK, this time the engine light has stayed on.
i am just charging my vida/dice computer and will give it a go tomorrow. last time i used it on my D5 it wouldn't recognise the USB. |
Mar 29th, 2022, 14:35 | #6 |
Graham63
Last Online: Mar 26th, 2024 16:39
Join Date: Mar 2007
Location: Towcester
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@ian ferguson, did you manage to solve the lumpiness problem?
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Mar 29th, 2022, 16:53 | #7 |
ian ferguson
Last Online: Apr 4th, 2024 16:13
Join Date: Aug 2006
Location: London
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