VW Goilf estate 19.l TDI with ATD engine

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Hi all,

The miles per gallon figure has dropped by 20%.

Ive checked for fuel leaks (none) and replaced the air, fuel and oil
filters and changed the oil.

The Car passed its emissions test at its MoT only 2 weeks ago (I've had
the problem a month now)

What else would cause a sudden and permanent drop of MPG?

I'm now getting 400 miles per tankful instead of 500 miles per tankful.
I can usually get 50 litres in a tankful.

Stephen


Re: VW Goilf estate 19.l TDI with ATD engine


Soft tyres, dragging brakes, engine temp sensor, thermostat?

Tim

Re: VW Goilf estate 19.l TDI with ATD engine

On 05/07/12 07:49, Tim wrote:

Check the tyres and brakes as suggested above. Other than that, get it
scanned.

How is the performance?


Re: VW Goilf estate 19.l TDI with ATD engine

On 5/07/2012 8:16 AM, Stephen H wrote:

Have you had work done on the car or did you do any work on the car?


Re: VW Goilf estate 19.l TDI with ATD engine

Stephen H wrote:

What did you do a month ago.



Re: VW Goilf estate 19.l TDI with ATD engine

On 05/07/2012 10:28, Mrcheerful wrote:

it is only in the past fortnight I have had 4 new tyres, (previous four
were at legal limit) a MoT pass, an EOBD reader check for current and
pending faults, (none found) new air/oil/fuel filters and oil change,
and no evidence of any diesel leaks.

and the poor MPG problem persists....

Re: VW Goilf estate 19.l TDI with ATD engine


My old VW's fuel consumption increased by 5-10% when I got 4 new tyres.
(Hankooks).

Tim

Re: VW Goilf estate 19.l TDI with ATD engine

On 6/07/2012 9:01 AM, Stephen H wrote:

What type of air filter did you replace the original with?


Re: VW Goilf estate 19.l TDI with ATD engine

Stephen H wrote:

were the tyres the same dimensions as the old? and was the tracking done
correctly?   If the tyres were a little different it will upset the miles
recorded, wrong tracking can increase drag.



Re: VW Goilf estate 19.l TDI with ATD engine

On 6/07/2012 9:01 AM, Stephen H wrote:

I had exactly the same thing but the wheels eventually fell off.


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