S40 cruise control

sledgehammer73 · May 5th, 2009, 23:39

Hi. I dont know if its me being silly but i wander if anyone can answer the qusetion for me.

When i engage cruise control on my '55' plate s40 (cruise on caption is lit) there appears to be an increase in engine noise/power?? compared to me travelling at the same given speed and conditions when i have my foot on the pedal-in other words the car appears noisier.I have taken into account the cruise function accelerating/deccelerating to maintain commanded speed.

Is this increased noise an increase in engine power-the noise definitely has that sound and if it is an increased power noise would i be right in stating that my car is therefore using more fuel and therefore the car isnt as efficient on MPG as 'manual/foot' throotle control?????????????

Hope i got my point across

iainmd · May 6th, 2009, 13:46

Mine has no extra engine noise when cruise is on and as a general rule cruise is no better or worse for MPG than your foot. If you're gas pedal heavy like me the cruise is a bit more efficient than my foot is.

Harvey1512 · May 6th, 2009, 15:04

I use mine quite a bit and have never noticed extra noise other than the obvious times when you are going uphill etc. Maybe an issue of some sorts.

catch22 · May 8th, 2009, 00:07

cannot say I've notice any additional noise ias a result of using cruise control

sledgehammer73 · May 8th, 2009, 01:46

OK thanks for the info guys-i will monitor it

Marechal · May 31st, 2009, 14:52

You might have this impression because the chosen speed on your cruise control is a "border" speed between two gears. This will cause the car to keep the lower gear engaged (say 3rd instead of 4th) which looks like the engine has more revs. Try to slightly increase the chosen speed, and make sure your geartronic box is set on D - automatic.

May 5th, 2009, 23:39	#1
sledgehammer73 New Member Last Online: Jun 10th, 2010 14:21 Join Date: Feb 2009 Location: CHESTER	S40 cruise control Hi. I dont know if its me being silly but i wander if anyone can answer the qusetion for me. When i engage cruise control on my '55' plate s40 (cruise on caption is lit) there appears to be an increase in engine noise/power?? compared to me travelling at the same given speed and conditions when i have my foot on the pedal-in other words the car appears noisier.I have taken into account the cruise function accelerating/deccelerating to maintain commanded speed. Is this increased noise an increase in engine power-the noise definitely has that sound and if it is an increased power noise would i be right in stating that my car is therefore using more fuel and therefore the car isnt as efficient on MPG as 'manual/foot' throotle control????????????? Hope i got my point across

May 6th, 2009, 13:46	#2
iainmd Member Last Online: May 23rd, 2024 10:23 Join Date: Nov 2004 Location: Fife View Photos By: iainmd	Mine has no extra engine noise when cruise is on and as a general rule cruise is no better or worse for MPG than your foot. If you're gas pedal heavy like me the cruise is a bit more efficient than my foot is. __________________ Present: 2009 Volvo V50 1.6D DRIVe SE Past: 2004 Volvo S40 T5 SE

May 8th, 2009, 00:07	#4
catch22 Master Member Last Online: May 16th, 2013 15:27 Join Date: Jan 2009 Location: *	cannot say I've notice any additional noise ias a result of using cruise control __________________ SIR JOSIAH STAMP, (President of the Bank of England in the 1920's, the second richest man in Britain): "Banking was conceived in iniquity and was born in sin. The Bankers own the earth.

May 6th, 2009, 15:04	#3
Harvey1512 Premier Member Last Online: Jan 30th, 2021 12:00 Join Date: Aug 2008 Location: Northumberland	I use mine quite a bit and have never noticed extra noise other than the obvious times when you are going uphill etc. Maybe an issue of some sorts.

May 8th, 2009, 01:46	#5
sledgehammer73 New Member Last Online: Jun 10th, 2010 14:21 Join Date: Feb 2009 Location: CHESTER	OK thanks for the info guys-i will monitor it

May 31st, 2009, 14:52	#6
Marechal Marechal Last Online: May 31st, 2009 14:52 Join Date: May 2009 Location: Beirut	You might have this impression because the chosen speed on your cruise control is a "border" speed between two gears. This will cause the car to keep the lower gear engaged (say 3rd instead of 4th) which looks like the engine has more revs. Try to slightly increase the chosen speed, and make sure your geartronic box is set on D - automatic.

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