MPG problems for the past year

[asif]

The vagcom man is Toph and he must know everything about Vagcom already, he deffo knows his shizzle.

[topher]

believe me this car has been thoroughly spanked with the vagcom stick all it ever showed was some missing boost, cured the leaks... then the maf popped up with some abnormal readings but not enough to trigger a dtc. Trying to scrounge a maf from somewhere for you asif

[Rhyso]

Just because its a new(ish) MAF doesn't mean it works

Lots of people have had faulty MAF's straight out of the box

[asif]

Cheers Toph as always mate your a star

Some weird stuff been happening with the car for the past 2 days, on my drive to work the MPG has increased almost back to where I started, which is kinda good news that i don;t have to put up with figures like 31 to 33 mpg at most, it is now just under 40mpg which is still a less than where i started befor the work but at the mintue i'm just glad it's not 31-33mpg, so what feels like a slitght improvement is really almost back to where I started on badish MPG.

Maybe it was something like the MAP sensor adjusting to it's new surroundings or something It has been about 200ish miles since the intercooler went in with the new MAP sensor.

What else could it be?

[asif]

Just because its a new(ish) MAF doesn't mean it works

Lots of people have had faulty MAF's straight out of the box

Really? that's bad news.

It was a spanker from GSF went for the Bosch one thinking it's be the best option but it made no difference what so ever at the time. Which led me to kinda believe the old one was ok and i've replaced it with another working one, or maybe faulty for faulty so it seems now.

You reckon my sysptoms are MAF related? Well I suppose the readings on the MAF were high as Toph stated.

Is there a way to find out if a replacement MAF is good to use or not?

[Rhyso]

Just because its a new(ish) MAF doesn't mean it works

Lots of people have had faulty MAF's straight out of the box

Really? that's bad news.

It was a spanker from GSF went for the Bosch one thinking it's be the best option but it made no difference what so ever at the time. Which led me to kinda believe the old one was ok and i've replaced it with another working one, or maybe faulty for faulty so it seems now.

You reckon my sysptoms are MAF related? Well I suppose the readings on the MAF were high as Toph stated.

Is there a way to find out if a replacement MAF is good to use or not?

Yep.  Dai-Cymru bought one from VW when he had his turbo.  After months of chasing problems the new owner found it had been the MAF which had been faulty from day one 

Get it on and get it logged.  As Toph has said to me its pulling silly high figures when idling!! I dug out an old log of mine and your figures are twice that of mine when idling!

[asif]

Cool cheers for that Rhyso that's great help, fingers crossed

[richandhazel]

Just because its a new(ish) MAF doesn't mean it works

Lots of people have had faulty MAF's straight out of the box

Is there a way to find out if a replacement MAF is good to use or not?

Yes there is a test you can carry out using VAGCOM that I'm sure Chris is already aware of, something along the lines of this:-

Go into Engine measuring block 003
Start Logging data
In a high gear (4th/5th), give full throttle from 2500 rpm up to 3500rpm.
Find and Open the Log file in Windows Explorer
Graph MAF actual -vs- rpm in Excel
The MAF is OK if the actual value is at least 850-900 mg/h at 3000 rpm.

[asif]

Fook me you guys sure got some good knowledge on these cars.

Cheers again to all that have given there input/advice it's really much appreciated as i'm really at the end of my tether (SP) with this car and the sh*te mpg it gives me.

You guys are all a brilliant advert for this forum

[Agreeable Slick]

Let us know if it cures the problem or not.