Dspeed

Wt are the first signs of MAF failure please guys?

New_scooby_04

iTrader: (4)

On its way out:

-Irratic idle
-Car threatens to/does stall at junctions
-Hesitation around 4k rpm

Completely shagged and ignored:

-White smoke pouring out the back of the car, melted piston!
-BIG bill for engine rebuild!

AFAIK

Ns04

pslewis

Ask a question on here, like, "My headlamps have gone dim" .... you will be told that its the MAF!!

Seriously, idle 'hunting' is apparently a major sign ..

Pete

New_scooby_04

iTrader: (4)

Good god, your headlamps are going dim Pete!?!?!? You need a new batter, alternator, new bulbs, new ECU and just to be sure......you'd better replace the MAF. STAT!!!!

Ns04

Dave_A

First sign I noticed was the 'hitting a brick wall effect' which felt like the the car suddenly lost all power, only for it to come back in straight away again.

Followed by mildly erratic surging during normal driving. Fuel consumption also increased.

New MAF after a computer diagnostics check sorted it out.

16vmarc

Mine violently juddered/hesitated under load. MAF changed fine for 2 weeks then problem reoccured. Leads changed now fine again.

So dont know if it was MAF or leads!

Car is a MY00.

Id definatley change the spark plugs and ignition leads before you even contemplate getting the MAF sensor changed.

Moley

iTrader: (9)

Bugger.....sounds like my MAF is about to die aswell

New_scooby_04

iTrader: (4)

Get it to a specialist before you change ANYTHING. It's dead simple for them to check the MAF, they may not even charge you.

NS04

Dspeed

Goin down my local in an hour. Car is starting to idle high then low and thretened to stall on me to day. Ne one know which one Id need for a UK MY00??

TonyG

When mine was on the way out, I got erratic idle and hesitation on acceleration. The garage tried an ECU reset because they "weren't sure the MAF was failing" - that made no difference, which says a lot for their diagnostic kit/experience. Took the car back, got them to replace it, and all the problems went away.

New_scooby_04

iTrader: (4)

Take one laptop, plug it into ECU, read voltage from Maf sensor, if above a certain threshold, it's a *******! Any proper specialist should be able to do this at the drop of a hat, If I understand it correctly.

Ns04

moneys

iTrader: (5)

just been told mine is knackered . the engine fault light flashed on for about 7 or 8 flashes under hard acceleration i stopped straight away but the car never seemed to be acting unusual. it happened again 2 days later so took it to the local subaru garage they diagnosed the MAF sensor luckily the person i bought the car off had extended the warranty so im covered . the garage told me i was ok to keep using the car and didnt have to worry about driving slowly. only other thing i can notice is im lucky to 20MPG. car is my01 wrx

moneys

iTrader: (5)

forgot to say my car is booked in for next week to have it replaced. garage said it should of cost about 280 . dont think mine is that badly damaged as the light hasnt been on since , but hey im sure someone on here will tell me different.

New_scooby_04

iTrader: (4)

If your maf is knackered DO NOT drive the car on boost until it is fixed. What garage told you you needn't worry?!?!?! It's a fueling issue, and driving a car on boost with a knackered maf can melt a piston.

£280!!!!!! Tell em to take a running jump, all you need replaced is the sensor for a new age AFAIK, not the whole unit, should be about £80,

NS04

Silver Scooby Sport

iTrader: (15)

Your better off putting one on anyway Rob then you know everything is safe

moneys

iTrader: (5)

not arsed about price mate as its getting done under warranty . thanks for telling me about driving off boost though as the garage said not to worry. to be honest though i aint been drining it that quick since ive had the problem. going to call the garage tomorrow an give them a bit of a rollicking i think, its not good to be giving advice out like that an no doubt if anything was to happen he would deny saying anything. how long is it once the MAF is faulty that it can cause damage to your car then?

jpor

iTrader: (1)

Wasn't it a known fault on the MY00 that the MAF can go faulty? When I had a MY00 Turbo my MAF had to be changed. Only because I was stupid enough to have a Blitz Metal Air filter put on. Apparrently you can just buy the sensor bit and not the whole lot, which should be cheaper <£100.

New_scooby_04

iTrader: (4)

AFAIK, there's no definitive answer to that...If it's knackered, it could be as soon as the first time you take it out for a good blat. It'll under-fuel or over-fuel with similar consequences, i.e. a melted piston. As soon as your warranty runs out, I'd be looking at another garage! Dodgy Mafs have destroyed many Subaru engines, I can't believe that they'd advocate not driving off boost untill its sorted. Is this a dealer, specialist or a Greasy Gary's Autoshop?

Ns04

New_scooby_04

iTrader: (4)

MY99s and 00s had particularly tempremental mafs, prone to failing, but they can go on the new ages too. As I said previously, I believe that this garage is quoting for the whole unit and not just the sensor, the former is signficantly more expensive....good job its a warranty job, eh!!

NS04

flynnstudio

..and I wouldn't be surprised if 'wet/oil' based air filters weren't the cause of a lot of MAF issues!..

Is it a hot wire type ? I know that oil from air filters sticks to it and eventually knackers hot wire types...

moneys

iTrader: (5)

its called holdcraft in widnes. would i know if i had caused any damage to it? as i said earlier ive had no other signs except the light flashing and crap MPG. would i be best not driving it or is it ok as long as i keep it off boost, i tend to drive off boost anyway as car only just gets warm by the time i get to work .

Dave uk blue mica

when mine was on the way out the idle was fine but the car lost power, it felt totally flat and was running low boost, the sensor was under £80 from the main dealer and takes 5 minutes to change.

ScoobLou

iTrader: (21)

When I was told I needed a new MAF (took it too the dealer I bought the car from as it was still under warranty) they also said it was fine to drive the car whilst waiting for the part to arrive. Didn't question it as had no reason to doubt them. Drove it a few days whilst waiting for the part to come in. Hope I didn't do any damage

moneys

iTrader: (5)

cheers mate my bottle went a bit before with what everyone has been saying. hopefully i aint done any damage either

Anger

iTrader: (4)

I put mine into a main dealer twice with the symptons of MAF failure and twice they said there was nothing wrong and the problem would come back a couple of days later
Told them to change the MAF anyway and havnt had any probs since

Dspeed

Thanks all but have found the problem. It was my idle solinoid. Sits on top of your engine. Removed it and it was covered in gunge. Cleaned it carfully with carb cleaner and replaced no more hiking and much smoother on idle. Think Im gna check mine from time to time now! As I was also told it may have been using more fuel because of that.

Where can I buy jus the MAf sensor as I need one for when I have my remap.

Anger

iTrader: (4)

The parts department in your local dealership should have MAF Senser's