Raartoot

Hi all, Just like to firstly say its a pleasure to be part of the crew!!!
Dont know why I didnt do this ages ago...
Anyway, Id like to rattle your brains...
I have just bought a 99v UK 2000 Impreza turbo (4dr) and its the dogs........yeah, well you know what I mean, Its been fully De-cat'd and Remapped my a well known Turbo Specialist!!, Now probs start when I tried to add a Bailey Dump valve (atmospheric) and after applying it, the drive was rough, believe!!!the boost felt held back and it felt lumpy on acceleration so I replaced it with the original one (which I guess is factory original) and its fine!!!!...now today I decided to change the standard air box to a New K&N filter (cone) and it done exactly the same, Felt lumpy and hesistant on boost!!!!!!WHy is this???
Please help me as Im baffled, The thought of the Maf sensor has crossed my mind, but why does it run ok when returned back to normal??
Its been remaped remember so could it be something to do with that???
Your help will be very much appreciated!!!!

Cheers crew!!!

RRH

leave it in the spec in which is was mapped. its a bit like having a suit made specifically for you by a tailor on Saville Row, and then trying to let the waist out yourself.

RLE

iTrader: (2)

Hi mate. Glad you're impressed with your purchase.

Personally if the car has been mapped by a reputable "mapper" then I'd leave alone.

Dont know what the K&N filters are like and there seems to be a few split opinions on them as well as DV in general. The Blitz filter that I put on my UK97 threw up all sorts of errors on the ecu. It wasn't until I took it off and replaced with the standard air box that I realised how much better the car drove with the oem bits in place. On the flip side some people fit them and have no problems.

I eventually did change the filter and the bov when I fitted an apexi ecu and had the car mapped at the same time with good results and power gains (filter obviously not the DV)

I think if the car feels good now then enjoy what you have..........its obviously not happy to run with the bits you want to stick on. No doubt you will get more complex technical responses which might point you in the right direction.

Good luck.

Raartoot

cheers guys, it looks that way then, Its just the Lag in gear change that bothers me really, I wonder if I put a bailey re-circulating one on would do any harm....

But saying that, it aint really that bad!!!!

Hmmmmm....................

ScoobyDoo555

Hi,

Welcome to the BBS

If you're getting lag during gear change, you're changing gear too early!!!

My mate has an MY96 WRX import - had a dump valve and induction kit. It drove like a pile of ****. Well compared to when he put it back to standard!!! (he bought the car pre-modded!)

If you want to uprate the air flow, TBH, I'd be looking at an STI or Green Panel filter. DON'T go for the oil ones. The MY99 has a terrible MAF (Airflow sensor) - it breaks by even looking at it. To replace is only £80, but can cause an engine rebuild if not addressed.
I've got an MY99 with an STI panel filter and a happy MAF standard DV too

All the best.

Dan

Raartoot

ah I see!! I get where you coming from...The panel filter sounds the next option,Thanks
How do I find out if my Maf is Worthy???
Is there a way I could test it....

Brun

If you are unsure about how old it is then change it. I changed mine 2 years ago when it failed (fortunately not taking the engine with it) and i will be changing it again this year. For the sake of £80 it makes good sense

pslewis

The poor bloke has only been here for 5 posts and you buggers are scaring the **** out of him already!!!!

Leave him alone for a while, at least .............

They'll have you changing your MAF, doing the fookin' Morris Dance Oil Change and re-mapping your ECU with minutes if you let them!!!

Disconnect your MAF, if engine stalls, don't worry anymore (or just leave well alone until you get lumpy idling!)

I don't believe that these engines are made out of chocolate ................. but, if you listen to all the old women on here, you will be convinced that you have just bought a car with all the reliability of a TVR or Rover!!

Oh, yes, welcome ............ I'm the Governor (in the sense that I play devils advocate and put the opposite view to challenge)

Pete

Brun

........now when i say mine failed - in actual fact, it hadn't - according to Subaru's select monitor, it was fine. My AFR gauge said different, so i had the car do a run on the Delta dash software and it showed the maf was in actual fact - failing. Plenty of engines have been wasted by mafs in this state.
Now listen to uncle pete and don't give in to the **** oil change
BTW Pete - i've got a Cocklink

pslewis

A CockLink

AND a AFR Gauge

AND a run on Delta Dash Software

and to think all I do is ACTUALLY just drive mine???

Pete

pslewis

Now, ask him how many is 'plenty'? ............. we need to quantify it or its just heresay.

Then ask how many had modified induction systems?

Then ask how many had been modified in any other way?

Then ask how many had their ECU's reset?

Then ask how many had their wiring harness disturbed?

In the final analysis you 'may' discover that ONE Engine has gone BOOOM due to the MAF and not having been fooked about with first ..... and, I would argue, out of ALL the Subarus sold in the UK that ONE is not a bad figure.

Certainly NOT an epidemic as some would have you believe!

Pete

ScoobyDoo555

Pete, OK, I'll bite

I cannot believe your stubborness(sp) on this matter
In my post, my intention was not to "scare the ****" out of the newbie, but to merely make him aware of an issue that as the air input section of his new car had been modified, it would be prudent to return it to standard, as (and this will be the final time I say this!), the MAF on the MY99 is/was an achilles heal of the engine!!!!

Now, surely if Subaru can accept this issue, then surely you can too Feel free to ring your dealer or IM claims dept.

You're dead right though - modded MY99s are more prone, especially if they've got uprated panel or induction setups, but MINE was unmodifed when it went through its 1st MAF. The resulting engine damage (before I even picked the car up) caused Subaru to pay for a new engine! The subsequent MAFs also failed (due to clumsy mechanics, and them forgetting to change the MAF that caused the initial ka-putt!), but I'd only modded the exhaust, not the air intake.

Whether you believe it or not, the MAF is fragile (why do you think they changed the design on the BugEye)

In response to the POSTER

As Pete says, you can test it, but TBH, when you change it back to standard, you know almost instantly
Oh yeh, the Oil change is also a load of bollix (do a search for oil changes )

More importantly, enjoy the car - they ain't "made of chocolate", they enjoy being driven!!! (Not that Pete would know )

Dan

pslewis

Dan

The Dealers I have spoken to, whilst my car was under warranty, stated that there was NO issue with failing MAFs.

And any engine blow-ups were 99% the result of modifying or thrashing the bollox off them ............

So, there we have it - the official line is, NO ISSUE.

Now, if someone could point me to a recall notice, some internal memo, anything official then I may change my tune .........

Pete

Tim W

iTrader: (1)

I hope you don't have an alarm on your car or towing electrics Pete...I'm sorry to say it, but your wiring loom has been disturbed and your MAF's going to fail!

ScoobyDoo555

I can see now your reasoning behind your stance, so please accept my apologies for the lack of understanding, but my dealers, Listers, were well aware of the problem, as were Keith Price garages when I explained why I needed a MAF

Your right though, it wasn't a product recall, but moreso another of the "issues" that Subaru seem to have brushed under the rug!!! IMHO, of course!

Interesting though that when diagnosing a performance-related issue with the MY99/00, most Subaru owners (I'm talking the petrol heads as opposed to the air heads!!) immediately mention the MAF??? I'm sure there is *some* element of rumour, but with 5/6 years of history/experience, there MUST be some element of doubt about this......

Food for thought, but probably not for this particular post!!!

Dan

Raartoot

...thanks for input guys, Just another quick one, Dan you stated when I change it back to Normal...(maf) Does this mean the maf is upgraded???when remap'd???

Or do you mean Ill notice a change for the better when replacing the MAF in general????????

Raartoot

...SORRY!!!, I meant you quoted when I change it back to Standard (MAF)...Im sure it aint an upgraded MAF, What exactly do you mean mate...?....

Cheers

Beev!!!

Raartoot,
I drive the exact same car as yourself (99V UK model) with a decat exhaust and Air filter... I was recommended to go for the K&N Panel filter and I can say it`s the best £40 i`ve spent on the car!!! It`s made such a difference to the sound of the turbo spooling up, it`s great (although my girlfriend struggles to understand why its so great - I know better). Would recommend one!
Also,
I asked my local Subaru dealers to check my MAF sensor and they put a brand new one on it to try, there was no difference, they told me mine was fine and charged me nothing!

Good luck with it!!!

Ross.

robertdon777

Had exactly the same prob on my standard MY01 classic turbo (so probably not because of the remap), felt as though it was holding back, solution - sell the dump valve and put standard one back on!. After that no hesitation and I can here the turbo spooling up again.

Graz

Ahh however Pete the most important peice of advice given was from Mike Wood of Prodrive on this very BBS in another post you were trolling in. You seem to have ignored it as it goes against your beliefs

Prodrive know much more about Subarus than your local dealers, in fact given the incompetence shown by my two most localish dealers I'd say most dealers don't know much at all about what they're maintaining. For example I reported an overboost problem on mine, instead of fixing it, they blocked off the bleed hose from the wastegate solenoid so I went from overboost to no boost. Marvellous Surfice to say I'm using independent specialists from now on.

So according to the above if you value your MY99/00 change the MAF as a service item, every 60k miles at the very worst case. And don't use oiled filters. IMHO induction kits cause more trouble than there worth and are only really necessary for monster BHP builds.

So Pete please **** off, we have heard it all from you, believe what you like but stop giving out duff advice to people on here who wouldn't know any better I'd far rather take advice from Prodrive than you.

If I'd just spent a load of my hard-earned on an Impreza I would say another £80 for a new MAF is well worth it for peice of mind. Better that than a £1000+ rebuild.

Full contents of the thread I quoted above here: http://bbs.scoobynet.co.uk/showthrea...6&page=1&pp=20