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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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Cold start hunting. 2.4T petrol auto.Views : 729 Replies : 9Users Viewing This Thread : |
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Dec 2nd, 2021, 15:34 | #1 |
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Cold start hunting. 2.4T petrol auto.
Hoping someone can assist with this one...
A few months ago, I was having issues with the V70, as it would intermittently cut out, when stopping at a junction or traffic lights, but I could start it up again, straight away. I replaced the MAF sensor and it seems to have cured this problem. Non Bosch unit. Now, only on a cold start, the car seems to be hunting a bit, for a few minutes, while heating up. If I drive away, it doesn't stutter at all, just when idling. Can anyone advise what could be causing this? Gary
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Current car: 2002 V70 2.4T SE Mod's so far: Orpheus alloys, 10.1" android multimedia head unit, Nappa leather rebuilt, wood trimmed m/function steering wheel, Polestar blue and black calipers, Pipe Dynamics custom turbo back stainless steel exhaust, with 200 cell sports cat, R engine and injector rail covers, tinted rear windows. Previous cars: 1982 760 GLE saloon 1989 740 GLE estate 1991 440 S 2003 S40 S - Gone but not forgotten. ☹ 16 non Volvos. |
Dec 2nd, 2021, 16:17 | #2 | |
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Dec 3rd, 2021, 09:01 | #3 | |
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Is there a cold start system on these engines, that may have a faulty/dirty component? Gary
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Current car: 2002 V70 2.4T SE Mod's so far: Orpheus alloys, 10.1" android multimedia head unit, Nappa leather rebuilt, wood trimmed m/function steering wheel, Polestar blue and black calipers, Pipe Dynamics custom turbo back stainless steel exhaust, with 200 cell sports cat, R engine and injector rail covers, tinted rear windows. Previous cars: 1982 760 GLE saloon 1989 740 GLE estate 1991 440 S 2003 S40 S - Gone but not forgotten. ☹ 16 non Volvos. |
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Dec 3rd, 2021, 10:52 | #4 | |
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have you checked for any stored fault codes ? possibly an air leak through a cracked hose ? That would bring up a message after a while though .
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Dec 3rd, 2021, 11:19 | #5 | |
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Might need to get a smoke generator and check for any air leaks. Gary
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Current car: 2002 V70 2.4T SE Mod's so far: Orpheus alloys, 10.1" android multimedia head unit, Nappa leather rebuilt, wood trimmed m/function steering wheel, Polestar blue and black calipers, Pipe Dynamics custom turbo back stainless steel exhaust, with 200 cell sports cat, R engine and injector rail covers, tinted rear windows. Previous cars: 1982 760 GLE saloon 1989 740 GLE estate 1991 440 S 2003 S40 S - Gone but not forgotten. ☹ 16 non Volvos. |
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Dec 3rd, 2021, 11:29 | #6 |
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The engine ECU uses the external temperature sensor in it's calculations , it might think it is a hot day when starting .... although the main air inlet temperature sensor is in the air mass meter.
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Dec 5th, 2021, 00:19 | #7 |
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cracked coil packs?
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2001 Volvo S60 T5 SE 2.3 Geartronic (Scrapped) 2007 Volvo S60 T5 SE 2.4 Geartronic (Sold) 2008 Volvo V70 D5 SE Sport Geartronic (Current) |
Dec 5th, 2021, 08:44 | #8 |
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Check the MAF, a favourite cause of hunting on older petrol engines. Might also be worth checking the resistance you're seeing on any coolant and intake temperature sensors while theyre stone cold, seeing if its within range.
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Dec 17th, 2021, 13:13 | #9 |
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They are all only a year old, Barry.
Hope they're not cracked already!🤯 Gary
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Current car: 2002 V70 2.4T SE Mod's so far: Orpheus alloys, 10.1" android multimedia head unit, Nappa leather rebuilt, wood trimmed m/function steering wheel, Polestar blue and black calipers, Pipe Dynamics custom turbo back stainless steel exhaust, with 200 cell sports cat, R engine and injector rail covers, tinted rear windows. Previous cars: 1982 760 GLE saloon 1989 740 GLE estate 1991 440 S 2003 S40 S - Gone but not forgotten. ☹ 16 non Volvos. |
Dec 17th, 2021, 13:15 | #10 | |
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Gary
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Current car: 2002 V70 2.4T SE Mod's so far: Orpheus alloys, 10.1" android multimedia head unit, Nappa leather rebuilt, wood trimmed m/function steering wheel, Polestar blue and black calipers, Pipe Dynamics custom turbo back stainless steel exhaust, with 200 cell sports cat, R engine and injector rail covers, tinted rear windows. Previous cars: 1982 760 GLE saloon 1989 740 GLE estate 1991 440 S 2003 S40 S - Gone but not forgotten. ☹ 16 non Volvos. |
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