Cleaned MAF, and car is slow again :(

[dubbed]

We need you guys in Melbourne...

[McDub]

Not a chance!
Oh and wanted to add, Marty was kind enough to give me a lift in his (very quick) car when i dropped my car off for the install, and as manaz said, they really do their best to look after your car. Very good guy, i feel like a goose for that comment before, was just posting on a whim i guess!

anways back on topic, i purchased a new MAF from Chatswood Classic cars (VW dealer). Really helpfull there, the guy let me test out the new MAF before i paid! If only they offered to reset the ecu for free... ha. So sat around for 40 odd minutes with the neg terminal of the battery off, hoping the poor mans reset would work. was quite funny doing all this in the VW service building.

anyway the jury is still out. before the engine felt slow and heavy... just really not a pleasure to drive. then with the new MAF, it's back to the "light" feel, and it feels much nicer, though i'm not convinced i have the same power as before (seems to be missing that surge of boost between 2000-3000rpm i would notice distincly in second gear). it didn't help me that its raining in syd and the roads are wet, wheel hop city. so hard to tell!
The easiest way to tell is i should be getting around 7 seconds for the 0-100 as i did this test shortly after i got it chipped, although once again it's wet, and not many legal places to do this!

will post back when i get that done.

[fuzion]

Not a chance!
Oh and wanted to add, Marty was kind enough to give me a lift in his (very quick) car when i dropped my car off for the install, and as manaz said, they really do their best to look after your car. Very good guy, i feel like a goose for that comment before, was just posting on a whim i guess!

anways back on topic, i purchased a new MAF from Chatswood Classic cars (VW dealer). Really helpfull there, the guy let me test out the new MAF before i paid! If only they offered to reset the ecu for free... ha. So sat around for 40 odd minutes with the neg terminal of the battery off, hoping the poor mans reset would work. was quite funny doing all this in the VW service building.

anyway the jury is still out. before the engine felt slow and heavy... just really not a pleasure to drive. then with the new MAF, it's back to the "light" feel, and it feels much nicer, though i'm not convinced i have the same power as before (seems to be missing that surge of boost between 2000-3000rpm i would notice distincly in second gear). it didn't help me that its raining in syd and the roads are wet, wheel hop city. so hard to tell!
The easiest way to tell is i should be getting around 7 seconds for the 0-100 as i did this test shortly after i got it chipped, although once again it's wet, and not many legal places to do this!

will post back when i get that done.

i dont even want to ask how much you paid for it .. ouch! lol.. dealers are too expensive for mafs!!

[McDub]

i dont even want to ask how much you paid for it .. ouch! lol.. dealers are too expensive for mafs!!

nah actually not too bad, they wanted $297 list, but i got it for $265.
don't think you're gonna save much importing your own, unless you're not buying OEM, though i could be wrong. btw this was a trade in part. plus having warranty on a part like this is a good thing (even though it can be hard to tell if the thing is faulty!)
http://www.ecstuning.com/Search/037906461c/ not much saving there, and that's before shipping

[dubbed]

That's a very, very good price from a Stealer! Damn.

[McDub]

OK guys, doesn't look good. i need some help here!

Finnally got around to doing 0-100 sprint times.

pre-chip: 8.7 sec
post-chip: 7.3 sec
post-maf replacement: 8.0 sec

So it's sitting somewhere in the middle.

i'm at a loss to think what the problem is.
only thing i can think of, is the plate/sensor in the new MAF isn't exactly centered in the housing like the old one was, so perhaps not reading correctly.
or otherwise, my MAF was never damaged, and it's something else.
boost leak? turbo is dying? rag stuck in the air box???

as i said, the only thing i recall touching was the air filter as i took it out, gave it a hit around because i had the top of the air box off to help get the MAF out when i initially tried to clean it.
so I can't think of anything else i could have interfered with...

thanks for any help.

[McDub]

^^^ anyone?

[h100vw]

How are you measuring the sprint mate? How do you know that is accurate???

I don't believe it to be a very repeatable test.

Gavin

[Manaz]

How are you measuring the sprint mate? How do you know that is accurate???

I don't believe it to be a very repeatable test.

Gavin

I'm with Gavin - there are too many variables (measuring process, ambient temperature, road surface, wind, clutch take-up for a particular run, fuel quality and load (load in general), tyre pressure, driver variations, etc) in a public road 0-100km run or anything done without highly accurate timing gear (like the car mags use). A before-and-after dyno on the same gear with the same operator is probably the best, properly timed (ie at a track, not on public roads) quarter miles give a more realistic measure (trap speed in particular).

[McDub]

How are you measuring the sprint mate? How do you know that is accurate???

I don't believe it to be a very repeatable test.

Gavin

i know it's not very accurate, and i won't tell you exactly how i did it, but i used the exact bit of road on each of the three seperate occassions, and for each time i wrote down in the last post, i was able to repeat that number within 0.1 seconds. the road had a slight incline, but that's irrelevant as i am using the figures for comparison purposes only.
I kept as much constant as i could, including the amount of petrol in the tank. i even did it just on fridays
The car FEELS much slower, and the crude 0.7 seconds slower speed i am getting now just proves to ME that it's not just all in my head

i ordered the 14lbs flywheel/clutch from ecs tonight so when that arrives, i'll be sending my car out (hopefully to seb) for some work!

anyway i'm not arguing the validity of my sprint times. my car is underperforming and i'm wondering why!
plus i can't exactly go back in time to when my car was working well and dyno it for comparison... i've got to run with the only test i had done prior to me stuffing around with the car!!!