Should the revs changed on a cold start....

Bashy · Apr 16th, 2021, 22:59

Hi folks, I am fairly sure my cars revs are the same, hot or cold start, about 700'ish, when its a cold, cold start, its like it sounds better if i rev it to around 1000...

davebb · Apr 16th, 2021, 23:43

Yes my euro 3 D5 starts at 950rpm when very cold then drops to 700rpm,
Dave

Bashy · Apr 17th, 2021, 02:00

I thought as much, thanks, any ideas as to why my does not?

davebb · Apr 17th, 2021, 06:54

Hi yes what is your coolant Temp reading with vida or a OBD 2 Reader
is it what the outside temp is on a thermometer,
Dave

Bashy · Apr 18th, 2021, 03:27

False alarm, or intermittent, i checked yesterday at -4ºC and it went to 900, then slowly dropped..

Georgeandkira · Apr 18th, 2021, 13:48

"...slowly dropped" means 15 to 20 seconds, yes?
During this season's -20℃ mornings my petrol would rev high for 45 seconds.
It's extremely consistent.

Bashy · Apr 18th, 2021, 13:54

Yeah, I can see it start dropping straight away...

davebb · Apr 18th, 2021, 17:36

Hi so have you tested to see what temperature it is reading on OBD2 or vida,
Dave

Bashy · Apr 19th, 2021, 01:05

Quote:

Originally Posted by davebb

Hi so have you tested to see what temperature it is reading on OBD2 or vida,
Dave

Not as yet as it would need to be cold, my carport is mostly enclosed except for the entrance and sun-facing, by the time it's a reasonable hour to faff about out there, the sun has already warmed everything up. Plus, its highly likely that it was a false alarm, i was probably expecting it to be above 1k revs with the choke on, as it was always below that, i assumed that the choke wasn't working, as it went to 900 then it is working ok

stuart bowes · Apr 19th, 2021, 10:23

mine (petrol not diesel if that makes a difference) hovers at around 14-500 for maybe 20 seconds then drops down to 1000 for about 15-20 seconds then settles around 700, depending how cold. in winter it was taking longer

tbh it feels like that's a bit over the top but because it settles quickly and no drama during the drive I don't mind because it helps to warm up nice and quick

is there even a choke on it now (other than just as a turn of phrase) I was assuming it just adjusted fuel trim electronically

Apr 16th, 2021, 22:59	#1
Bashy Aged Member Last Online: Feb 20th, 2024 09:47 Join Date: Nov 2000 Location: Weeting	Should the revs changed on a cold start.... Hi folks, I am fairly sure my cars revs are the same, hot or cold start, about 700'ish, when its a cold, cold start, its like it sounds better if i rev it to around 1000... __________________ Regards, Bashy MY07 (56 plate) V70 Geartronic 2.4 D5 185bhp 173k, 17", full leather, an auto-dimming mirror and auto wipers are the best it can do - I have added (poorly) limo black, rear camera and parking sensors

Apr 17th, 2021, 02:00	#3
Bashy Aged Member Last Online: Feb 20th, 2024 09:47 Join Date: Nov 2000 Location: Weeting	I thought as much, thanks, any ideas as to why my does not? __________________ Regards, Bashy MY07 (56 plate) V70 Geartronic 2.4 D5 185bhp 173k, 17", full leather, an auto-dimming mirror and auto wipers are the best it can do - I have added (poorly) limo black, rear camera and parking sensors

Apr 18th, 2021, 03:27	#5
Bashy Aged Member Last Online: Feb 20th, 2024 09:47 Join Date: Nov 2000 Location: Weeting	False alarm, or intermittent, i checked yesterday at -4ºC and it went to 900, then slowly dropped.. __________________ Regards, Bashy MY07 (56 plate) V70 Geartronic 2.4 D5 185bhp 173k, 17", full leather, an auto-dimming mirror and auto wipers are the best it can do - I have added (poorly) limo black, rear camera and parking sensors

Apr 18th, 2021, 13:54	#7
Bashy Aged Member Last Online: Feb 20th, 2024 09:47 Join Date: Nov 2000 Location: Weeting	Yeah, I can see it start dropping straight away... __________________ Regards, Bashy MY07 (56 plate) V70 Geartronic 2.4 D5 185bhp 173k, 17", full leather, an auto-dimming mirror and auto wipers are the best it can do - I have added (poorly) limo black, rear camera and parking sensors

Apr 19th, 2021, 10:23	#10
stuart bowes trying to be helpful Last Online: Today 02:08 Join Date: Aug 2020 Location: Dagenham	mine (petrol not diesel if that makes a difference) hovers at around 14-500 for maybe 20 seconds then drops down to 1000 for about 15-20 seconds then settles around 700, depending how cold. in winter it was taking longer tbh it feels like that's a bit over the top but because it settles quickly and no drama during the drive I don't mind because it helps to warm up nice and quick is there even a choke on it now (other than just as a turn of phrase) I was assuming it just adjusted fuel trim electronically __________________ V70 '01 auto petrol 2.4 (140) 72k ------------------------- mini project - link

Apr 16th, 2021, 23:43	#2
davebb Premier Member Last Online: Yesterday 19:06 Join Date: Aug 2013 Location: Emsworth,hants	Yes my euro 3 D5 starts at 950rpm when very cold then drops to 700rpm, Dave

Apr 17th, 2021, 06:54	#4
davebb Premier Member Last Online: Yesterday 19:06 Join Date: Aug 2013 Location: Emsworth,hants	Hi yes what is your coolant Temp reading with vida or a OBD 2 Reader is it what the outside temp is on a thermometer, Dave

Apr 18th, 2021, 13:48	#6
Georgeandkira Premier Member Last Online: Yesterday 21:02 Join Date: Feb 2009 Location: Hackensack	"...slowly dropped" means 15 to 20 seconds, yes? During this season's -20℃ mornings my petrol would rev high for 45 seconds. It's extremely consistent.

Apr 18th, 2021, 17:36	#8
davebb Premier Member Last Online: Yesterday 19:06 Join Date: Aug 2013 Location: Emsworth,hants	Hi so have you tested to see what temperature it is reading on OBD2 or vida, Dave

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