MAF on the way out?

[KenM]

Good evening all, did quite a bit of digging with regards to MAF readings. Recently purchased and a touch down on power, thought it may be maf and did a fats run running vagcom. The results are below, can someone cast their eye over them and confirm my suspcions? Cheers.

Engine Speed Mass Air Flow
(G28) (G70)
/min g/s
3400 35.75
3400 38.94
3480 53.5
3560 40.81
3560 28.58
3560 24.75
3560 58.92
3840 196.56
4360 212.19
4920 245.56
5480 257.31
6000 282.47
6480 297.22
6960 311.19
7200 8.06


3520 27.42
3600 104.11
4040 205.67
4640 240.08
5200 272.61
5800 300.5
6360 307.58
6880 317.58
7200 149.03



3520 24.14
3560 28
3560 37.47
3800 158.53
4360 217.22
4920 253.31
5480 269.58
6080 298.75
6640 319.47
7120 330.86
6640 17.67

AMD stage 2, K&N flat panel & full miltek so would have expected around 340. All input really appreciated. Recent dyno run showed I was missing about 70 hp.

[jimbo1234567]

if you want my advice change the maf asap as a matter of course. the figures look a little low but what you dont want is the maf going dead and taking out the egt and lambda sensors which is what will happen. changing the maf is an easy diy job.

[Virdee Autos]

For the sake of £80 or so i'd replace it as a matter of preventative maintenance

Plus as mentioned DIY job so you can't go wrong.

Mine surprisingly was original from day one!

[R5YUG]

Mine surprisingly was original from day one!

So was mine when I had it changed a couple of months back... surprising that they aren't part of a standard service really.

[dace]

Mine surprisingly was original from day one!

So was mine when I had it changed a couple of months back... surprising that they aren't part of a standard service really.

Ditto for me too. Had it changed along with a lamba sensor. The car is back on song now...

[Nige_RS4]

Ken, get the sensor only from http://www.vastperformance.com - should be less than £35 delivered from the US.

Figures look low to me, you should be max'ing out the MAF readings on vag-com at your stage of tune (364.08 g/s).

[KenM]

Cheers guys... had my suspicions after dyno came in low and the readings look a little low but wanted to get a second opinion on it. It should max them out I would have imagined.

[dhali]

Mine surprisingly was original from day one!

So was mine when I had it changed a couple of months back... surprising that they aren't part of a standard service really.

Ditto for me too. Had it changed along with a lamba sensor. The car is back on song now...

How do you guys know if its the original one? Does it have a date on it somewhere?

[dhali]

Ken, get the sensor only from http://www.vastperformance.com - should be less than £35 delivered from the US.

Figures look low to me, you should be max'ing out the MAF readings on vag-com at your stage of tune (364.08 g/s).

How long does the delivery normally take Nige?

[smurfbus]

Ken, get the sensor only from http://www.vastperformance.com - should be less than £35 delivered from the US.

Figures look low to me, you should be max'ing out the MAF readings on vag-com at your stage of tune (364.08 g/s).

How long does the delivery normally take Nige?

They are fast too, but IIRC you need google_shop account to buy.

LOL, I have about 5 spare mafsensors and one in the glovebox all the time. The maf housing screws are hacked for normal screwdriver.

[Nige_RS4]

How long does the delivery normally take Nige?

Mine took less than a week and I order a pressure tester too (which is a big item).

[rsmonkey918]

Hi Dhali- yep the unit has a date stamp- mine was also the original- after 8 years. Never realised what a big deal they are until 1) the gf's TT had a massive hole in the mid-range, confirmed by a VAGcom run. 60 quid later job done, and 2) have noticed a subtle but definite improvement in performance since mine was changed. Also relieved it hadn't (hopefully) had chance to cook the EGT's and lambda sensors!

[KenM]

New one ordered in this morning... thanks Nige for the heads up on where to pick it up. Get it changed over and do the reset through vagcom and recheck the readings. Hopefully should go a long way in finding the missing hp. Did a full diagnostics and nothing else showing up....

[dhali]

i will order one as have had the car nearly 4 years and it hasnt been changed since or as far as i know before .
Never noticed any lack of performance though.

thnx for the info guys

[KenM]

To be honest I wouldn't have noticed myself... very quick car to start with but dyno showed a few hp had gone awol and went digging. I'll get the new MAF and reset accordingly.