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Model specific boards => Golf mk4 => Golf mk4 TDI => Topic started by: FlosstheAwol on 05 December 2006, 18:46

Title: 2003 Golf GT Tdi 130 Poor MPG
Post by: FlosstheAwol on 05 December 2006, 18:46


Hi Guys,

I've got a 2003 golf gt tdi 130 with 82,000 on the clock and full VAG history

When I first got the car it would do on average 51-54 round town and 52-59 on the motorway. now from cold its struggling to so 23 ish and when its warmed up its averaging at 32-36 at best.  The moment you put your foot hard down it drops down to mid to low twentys!!

The cars had a new air filter, new fuel filter,  just had its oil changed using castrol slx LL2 0-30 oil.

Its had a new MAF meter from vw,  new suspension bushes and track rod ends, and ball joints and new shock absorbers.

Any one got any ideas  because I'm really scratching my head!!


Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: GazB on 06 December 2006, 20:52
You sure the garage did'nt drop a 20valve turbo in it  :grin:
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Bluefox on 06 December 2006, 22:17
Is that what your car's telling you? Or have you calculated those latter figures? Could be a problem with the computer reading incorrectly. Try measuring the milage you get from say a full tank and calculate the mpg the old fashioned way :)
That said, if the fuel consumpution has gone up that much, perhaps it's got something to do with that new MAF sensor? Possibly?
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: FlosstheAwol on 11 December 2006, 16:37


Its getting about 310-320 miles to a full tank,  it seems that when you keep the revs under 1500 its economy is about 36-39 and when you start to rev it it drop's sharply off.

Been to my local vw dealer today (Hadwin's at Lindale) and they plugged it into VAGCOM I think and did a 'download' and diagnostics check,  they all came back clear surprisingly!!

They have lent me a brand new in the box airmass meter to try for a week to see if that improves it.

well Guys  fingers crossed
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Mantamad on 11 December 2006, 19:27
Let us know if it works :)
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Ridg on 12 December 2006, 13:31
Quote from: FlosstheAwol on 11 December 2006, 16:37


Its getting about 310-320 miles to a full tank,  it seems that when you keep the revs under 1500 its economy is about 36-39 and when you start to rev it it drop's sharply off.


probably don't have to tell you but thats terrible, i got 475 from my last tank of fuel.

nice of them to lend you a new airmass meter, can only hope that fixes your problem
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Rhyso on 12 December 2006, 16:27
as previously said that's not good at all  :sad:

did the dealers hook it up to VAG COM? were any faults thrown up??
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: richandhazel on 12 December 2006, 19:04
Quote from: FlosstheAwol on 11 December 2006, 16:37


Its getting about 310-320 miles to a full tank,  it seems that when you keep the revs under 1500 its economy is about 36-39 and when you start to rev it it drop's sharply off.

Been to my local vw dealer today (Hadwin's at Lindale) and they plugged it into VAGCOM I think and did a 'download' and diagnostics check,  they all came back clear surprisingly!!

They have lent me a brand new in the box airmass meter to try for a week to see if that improves it.

well Guys  fingers crossed


They are dreadful figures, definately something not right. 
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: A7 UFO on 13 December 2006, 09:23
It must be over fuelling like a b!tch.  Would hate to be driving behind you when you boot it. :sick:
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: FlosstheAwol on 17 December 2006, 11:07


Hey all,

I've been running round for a few days now with the 'Borrowed' MAF.  big improvement- back up to 51-54 mpg now, seems like the old ( 1 month old!) one was faulty when the revs rose over 1500. must have definately been over fuelling higher up the rev range!

Funny though,  the VAG technician that downloaded the car said they was no faults whatsoever with the old maf, and that was what his computer said-  just go's to show that they are infallable!

Regards and thanks for your help

John
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: GazB on 17 December 2006, 21:28
Glad to hear it is ll fixed, Vag-com or equivlent can struggle to find faults with the maf
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: richandhazel on 18 December 2006, 08:09
Quote from: FlosstheAwol on 17 December 2006, 11:07


Hey all,

I've been running round for a few days now with the 'Borrowed' MAF.  big improvement- back up to 51-54 mpg now, seems like the old ( 1 month old!) one was faulty when the revs rose over 1500. must have definately been over fuelling higher up the rev range!

Funny though,  the VAG technician that downloaded the car said they was no faults whatsoever with the old maf, and that was what his computer said-  just go's to show that they are infallable!

Regards and thanks for your help

John

The MAF has to fail in a big way to throw up a fault code. There is a test you can do but it involves taking the car are out for a run with VAGCOM connected.
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: richandhazel on 18 December 2006, 08:13
This is where I have carried out the test:-

http://www.golfgtiforum.co.uk/index.php?topic=36219.0 (http://www.golfgtiforum.co.uk/index.php?topic=36219.0)

Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Ridg on 18 December 2006, 08:51
Quote from: richandhazel on 18 December 2006, 08:13
This is where I have carried out the test:-

http://www.golfgtiforum.co.uk/index.php?topic=36219.0 (http://www.golfgtiforum.co.uk/index.php?topic=36219.0)



what do you need to test the MAF yourself i'm guessing a laptop running the VAGCOM software, and some sort of cable, what cable do you need and how expensive are they?
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: richandhazel on 18 December 2006, 15:30
Yes and I think this is the cable that I have:-

http://www.ross-tech.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=VCKU0&Category_Code=IC (http://www.ross-tech.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=VCKU0&Category_Code=IC)

Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: richandhazel on 18 December 2006, 15:32
looks like they are readily available on ebay:-

http://cgi.ebay.co.uk/USB-Vag-Com-Compatible-Cable-Interface-VW-Audi-VagCom_W0QQitemZ330064162737QQihZ014QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem?hash=item330064162737 (http://cgi.ebay.co.uk/USB-Vag-Com-Compatible-Cable-Interface-VW-Audi-VagCom_W0QQitemZ330064162737QQihZ014QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem?hash=item330064162737)

Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Ridg on 18 December 2006, 16:15
Quote from: richandhazel on 18 December 2006, 15:32
looks like they are readily available on ebay:-

http://cgi.ebay.co.uk/USB-Vag-Com-Compatible-Cable-Interface-VW-Audi-VagCom_W0QQitemZ330064162737QQihZ014QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem?hash=item330064162737 (http://cgi.ebay.co.uk/USB-Vag-Com-Compatible-Cable-Interface-VW-Audi-VagCom_W0QQitemZ330064162737QQihZ014QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem?hash=item330064162737)



@ under £15 i'm tempted to get one just to see what mines doing and have a snoop around, plus it will come in handy if i attempt the cruise mod down the line.

do yo need a licensed version to test the MAF?
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: richandhazel on 18 December 2006, 19:25
looks like it can be tested with the unlicensed version:-

http://www.golfgtiforum.co.uk/index.php?topic=36219.msg377778#msg377778 (http://www.golfgtiforum.co.uk/index.php?topic=36219.msg377778#msg377778)
Title: Re: 2003 Golf GT Tdi 130 Poor MPG
Post by: Ridg on 18 December 2006, 22:10
Quote from: richandhazel on 18 December 2006, 19:25
looks like it:-

http://www.golfgtiforum.co.uk/index.php?topic=36219.msg377778#msg377778 (http://www.golfgtiforum.co.uk/index.php?topic=36219.msg377778#msg377778)

just ordered the cable, i doubt it will come till new year, but will be testing it then.

nice one thanks for the link.