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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
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Erratic mpg.Views : 973 Replies : 12Users Viewing This Thread : |
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Nov 8th, 2021, 20:39 | #1 |
New Member
Last Online: Jan 25th, 2023 17:45
Join Date: Nov 2021
Location: Manchester
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Erratic mpg.
Hello all, my 2013 S60 D4 163bhp 5 cyl has recently developed an intermittent fault. It used to deliver upwards of 50mpg with ease all the time, but now I'm struggling to get above 40mpg. Sometimes it runs fine still, but at other times it takes a big hit on the fuel consumption. When it's running fine it'll idle at 0.1gph, but when it's running bad it idles at 0.3-0.4gph. I know when the car is doing a dpf regeneration and its not that. With it being erratic I was thinking a sensor might be faulty, but I wouldn't know where to begin. Can anyone point me in the right direction of where to start looking/checking please? Thanks in advance of any replies.
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Nov 9th, 2021, 18:41 | #2 |
Premier Member
Last Online: Today 15:51
Join Date: Oct 2011
Location: Groningen
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How do you know that no dpf regeneration is going on?
I bet it is... your model can with the torque app read out the dpf temperature. Or egr shutoff and throtle restriction Try it Also if regeneration is going on and your idling the regeneration is halted after a certain time idling activating again after some rpm/load If there was overfueling at idle there would be higher rpm.... diesel engines have massive air fuel ratios Last edited by 5cilinder; Nov 9th, 2021 at 18:51. |
Nov 9th, 2021, 19:10 | #3 | |
New Member
Last Online: Jan 25th, 2023 17:45
Join Date: Nov 2021
Location: Manchester
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Quote:
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Nov 9th, 2021, 19:21 | #4 |
New Member
Last Online: Jan 25th, 2023 17:45
Join Date: Nov 2021
Location: Manchester
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I've got the torque app already, I'll check out the temps and stuff. Been a while since I've used it and thought it was pretty rubbish, but I'll give it a try.
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Nov 9th, 2021, 20:16 | #5 |
Premier Member
Last Online: Today 13:33
Join Date: Mar 2017
Location: Manchester
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if you think the torque app is rubbish i dont think you will get along with vida it is comprehensive but quite difficult to use it takes a long time to be good with vida
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Nov 10th, 2021, 02:11 | #6 |
Premier Member
Last Online: Today 15:51
Join Date: Oct 2011
Location: Groningen
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Ofcourse vida is much better for fuel corrections and sensor callibration etc
But torque is handy for obd2 faultcode use and some sensor readouts and daily use since the phone is already there in the car.... a laptop and dice is a bit bulky for daily simple readouts i have both and torque is handy ,alarm settings , regeneration alarms and monitoring airmass tweaking during regeneration And ofcourse quick faultcode readouts during acute problems on the way Ofcourse vida is needed for most deeper problems , but those are much more rare Last edited by 5cilinder; Nov 10th, 2021 at 02:15. |
Nov 10th, 2021, 02:21 | #7 | |
Premier Member
Last Online: Today 15:51
Join Date: Oct 2011
Location: Groningen
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Quote:
Gives much more accurate readouts ...... with no regeneration and depressing pedal ther is fuel cutoff without regeneration WITH regeneration with pedal depressing there will be fuel usage Even better with torque you can easily alarm and see when a regeneration takes place on your phone in the backround. If there are no obvious obd2 codes (with torque) then further investigation with vida is needed if its not regenerating |
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Nov 10th, 2021, 02:30 | #8 |
Premier Member
Last Online: Today 15:51
Join Date: Oct 2011
Location: Groningen
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Aircon use wil also impact idle fuel consumption/difference at the traffic lights in a massive way if its coupled or decoupled at idle!
One traffic light aircon decoupled compressor.... next it could be coupled and loading the engine The indicator if the aircon is on is no way to know if the compressor is engaged or not..... if its off then you know its always off |
Nov 11th, 2021, 16:35 | #9 | |
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Last Online: Apr 22nd, 2024 11:55
Join Date: Sep 2008
Location: London
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Quote:
Just select 2008+ profile for 5-cylinder engine, or 2014+VEA profile for 4-cyl VEA engines (where you get engine oil level in mm). DPF soot and other sensors are in All sensors menu. |
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Nov 11th, 2021, 22:56 | #10 |
The Brit Brick
Last Online: Aug 13th, 2023 09:39
Join Date: Jul 2021
Location: Warwickshire
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Are you calculating the MPG properly, or relying on the dash display?
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