Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg

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Wed 13 Apr 2022 19:36
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Mark Martel

Hi I have a 2013 vauxhall insignia 2.0 cdti vx-line manual, I am getting poor MPG. The car only has 65000 on the clock and has been serviced all its life by vauxhall according to the service book. I am currently only getting 28.5mpg on a run and around town and seams sluggish when driving up hills. I have had a new turbo and boost controller fitted that has helped with the power a bit but still not wright and I am at the end of my tether and don't want to waste any more money on just chucking parts at it. Please has anyone else had this issue and now how to cure.please help tha ks.

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Wed 13 Apr 2022 19:44
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - bathtub tom

How long have you had the car and is this a sudden worsening economy?

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Wed 13 Apr 2022 19:57
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Crickleymal

It could be a number of things. Faulty egr, MAF sensor etc. Have you had the codes read?

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Wed 13 Apr 2022 20:47
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Mark Martel

Hi have had the car 6 months and seams to be getting worse. There is no codes egr has been cleaned and MAFS has been cleaned also the throttle body has been cleaned.

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Wed 13 Apr 2022 22:33
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - bathtub tom

Tyre pressures? Wheel alignment? Binding brakes?

How are you measuring the economy? Brim to brim tanks, or fuel gauge?

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Thu 14 Apr 2022 07:33
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Mark Martel

Hi what the car dash is telling me plus how many miles am getting to a tank of fuel. I just got 125 miles from just over half a tank of fuel which can't be wright.

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Thu 14 Apr 2022 09:19
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - bathtub tom

Hi what the car dash is telling me plus how many miles am getting to a tank of fuel. I just got 125 miles from just over half a tank of fuel which can't be wright.

Neither method is an accurate measurement. You need to fill the tank, note the car's mileage. Run the car until it's less than half full then re-fill the tank. Note the amount of fuel it takes and how far it's gone, then do the maths.

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Sat 16 Apr 2022 09:59
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Andrew-T

Hi what the car dash is telling me plus how many miles am getting to a tank of fuel. I just got 125 miles from just over half a tank of fuel which can't be right.

Give it a dose of 10 or 20 litres of V-power superdiesel (or similar). That may make some difference. By all means do your own calculations to check the numbers on the dash display - I don't like filling to brim, but whatever turns you on I suppose. But anything under 30mpg is dreadful for a diesel car. If all else fails find someone who understands modern diesels.

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Thu 14 Apr 2022 08:27
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Big John

This car is a fairly low mileage car for a modern diesel - what is going on re DPF regenerations etc. Is the oil level rising and/or does the oil smell of diesel?

Edited by Big John on 14/04/2022 at 08:27

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Thu 14 Apr 2022 13:38
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Mark Martel

Hi

I will check the oil after work but its just been changed due to having a new turbo fitted. If it has got Diesel in oil we're would it be coming from please.

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Sat 16 Apr 2022 09:21
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Big John

Hi

I will check the oil after work but its just been changed due to having a new turbo fitted. If it has got Diesel in oil we're would it be coming from please.

I was asking re diesel smell in oil / rising sump oil levels as it can indicate failed DPF regens - during active regens extra diesel is injected during the exhaust stroke and during this period fuel consumption would be worse.

Why was a new turbo fitted? and any thing else changed?

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Sun 17 Apr 2022 08:33
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Mark Martel

Hi

Had the turbo changed be case it lost power and went into limp mode. When I took it to garage they told me the codes were saying failed turbo and stuck veins. So have had a new turbo and new boost controller plus the intercooler pipe replaced as I no these are common to fail. Since this the power has come back apart from a slight dead spot until it gets to 1500 rpm then goes. Am not got any fault codes any more. I have also just fitted new discs and pads all round this weekend to eliminate brake binding.

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Fri 15 Apr 2022 20:15
Vauxhall insignia 2.0 cdti 2013 vx line - Poor mpg - Mark Martel

Hi have check and can't smell any diesel in the oil and the level is as should be.

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