Poor mpg

[joelee]

I am getting very poor mpg on my car I am struggling to get over 27 average with a 24 mile motorway drive every day I have got a stage 1 map and I am not booting it so any ideas cheers

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[alexmccabe]

Have you checked all the obvious points? The DV and the PCV? If not, the thermostat and the MAF.

[MPS]

That's defo not right, on a long steady motorway run especially with cruise on you should easily get 38mpg

[alexmccabe]

That's defo not right, on a long steady motorway run especially with cruise on you should easily get 38mpg

Yeah I get 38mpg cruising at 65mph

[joelee]

Have you checked all the obvious points? The DV and the PCV? If not, the thermostat and the MAF.

how do I check the mad and thermostat

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[alexmccabe]

Have you checked all the obvious points? The DV and the PCV? If not, the thermostat and the MAF.

how do I check the mad and thermostat

For checking the MAF: http://www.mk5golfgti.co.uk/forum/index.php?topic=40051.0
Thermostat: If the car takes a while to get up to 90º engine temp, or doesn't at all then it's your termostat and it is over-fuelling.

[joelee]

Have you checked all the obvious points? The DV and the PCV? If not, the thermostat and the MAF.

how do I check the mad and thermostat

For checking the MAF: http://www.mk5golfgti.co.uk/forum/index.php?topic=40051.0
Thermostat: If the car takes a while to get up to 90º engine temp, or doesn't at all then it's your termostat and it is over-fuelling.

it's sits on 90 perfect and does not take long to get there I'll check them other bits later on too

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[joelee]

Well I have had it scanned today and it cane up with ait leek in the intake system so I took the pcv valve off to find I could blow both ways on it so I changed that and the power is back but I thought the dv will bring that fault up as well

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[bower]

im having the same problem, how longs a long time to get to 90? this car takes a long time compared to my old vxr but thought its maybe just how these cars are and if it was the thermo i wouldnt have thought it would ever get to 90 or fluctuate at least

is there anyway to check on vcds? ive got it but new to it so not sure what im doin lol

[OSB]

im having the same problem, how longs a long time to get to 90? this car takes a long time compared to my old vxr but thought its maybe just how these cars are and if it was the thermo i wouldnt have thought it would ever get to 90 or fluctuate at least

is there anyway to check on vcds? ive got it but new to it so not sure what im doin lol

There have been quite a few posts on this recently. There seems no doubt that these cars do take longer than most other cars to get up to temp.
In my case, it was taking 6-7 miles to get up to 85 where it stuck - apart from the odd motorway run when it got up to 90.
I changed the temp sender - no improvement except it then read more accurately!
Then got the thermostat changed - Big improvement!
I get warm air into the cabin after a mile or so, with an outside temp of about 12 deg it gets to 90 after 2 1/2 to 3 miles. Colder now, 5 deg, gets up to temp after 3 1/2 to 4 miles.
Performance is now better and MPG has improved. 

[Jap4447]

I was getting 28-29mpg average doing 80-90 mph for around 50 miles, does this seem normal?