Hi guys,
i really need some help please or it looks like its time to change cars coz i`m getting fed up with wasting 80quid a shot on maf sensors, blew one again last saturday and again friday, could it be my hks super power flow thats fitted?also had the same prob with a k&n basically in the last year i`ve blown 6 or 7 now and i`m not getting any joy with my garage .......so guys please help me and put ya thinking caps on please. Any suggestions would be most helpful cheers. Its a my99



unhappy
paul

 

The MY99/00 Maf is very fragile compared to the earlier and later models and does not really like induction kits. I have avoided them for this very reason on my MY99 and have still had a MAF faliure just using STI panel filters.

I would just for arguments sake refit the original airbox for now with a new MAF and see if you can get more than a couple of weeks out of it. If so i think you will have found your problem.

I have been told that the standard air box with a performance panel filter in it does not become a real problem till u are trying for more then 330-350 bhp anyway, so unless you have a monster bhp car it could be worth a shot with the original box for a bit.

Dan.

 

Dan a lilltle problem there ......i have a hks fmic and the bloody pipes are in the way and refittment of the old filter box is proberly an impossible task i think. I wouldnt call her a monster but she pulling 340bhp at the mo and i`m that sort of guy who just wants to squeeze out every little bit of hp i can get. My mum always said i was a greedy little git.

 

Fair enuff did you say you were popping Maf's with the same reuglarity with a K&N induction kit?

 

yeh had the same prob and the garage in there wisdom said replace the k&n with the spf .....of coarse this came at a cost to me. The battery isnt over charging nor is the battery nearly dead....could it be a problem with the mapping? i have been told that the ecu has to be taught which induction kit is fitted....i`ve followed the wires back and cant find any reason for a short. I do have amps and a sub but no power cap but it has happened two times now with no stereo even switched on. I stripped the filter and maf housing out yesterday and the gauze inside was very dirty, it was like black soot, also i have noticed a burning smell b4 she pops ,its mind boggaling and expensive and a headache ....the headache bit is the other half going on about getting rid but i just cant.

 

Popular belief on here has it that the K&N is probably one of the most MAF friendly induction Kit's you can get. Even though the MY99/00 MAF is fragile i would expect it to run for alot longer than a week with a K&N Kit.
I think from your description of the guaze in the intake pipe before the maf you can see how well the HKS filter is filtering and that certainly won't be helping matters.

Is there any sign of this black soot you mention on the outside of the filter?

I would be very surprised if the mapping would not have an effect on the life expectancy of a maf. The ecu does learn but it does most of this with the first part throttle squirt once the map has been put in.

I assume as you are still running the MAF it's on the standard JECS ECU with an EcuTek reflash? or maybe a link or PFC?

Have you tried speaking to your mapper to see if he has any ideas on the subject? and when you say you have taken the car to a garage are they an independant subaru specialist or a main dealer?

Dan.

 

I cant see any soot deposits on the sponge, yes i do have a ecutek remapped ecu. The garage in question have been est for 30yrs but are not scoobie specailists. I am now taking it on tuesday to xtreme scoobies who hopefully can shed some light on the matter. My local scoob dealer wont touch it...and all they suggest is replace the old air box, but as you know this is not possible. So on i trott in my scoob in limp mode on a bloody bank holiday weekend

 

I think you are right, a visit to a established subaru specialist is the next port of call.
Hope they can sort if for you and you can get back to enjoying your car.

Good Luck

Dan.

 

Is the induction kit being supported by any sort of bracket? - If it is left to just flap around, then it's likely that the vibration is killing the MAF.

IMO, you should bin the HKS filter, replace with a lightly oiled K&N and make a couple of decent brackets to support the filter + MAF

Has your MAF got a green spot of paint on the outside of it? - These are supposed to be more robust than the original items.

 

thanks for your time dan and fingers crossed. Have a good one

paul

 

no theres no support there and yes there is a green spot of paint on the maf to the side.The other problem is the k&n will not fitt as the fmic pipes are in the way,the garage told me that the spf is the only induction kitt that will fit with hks fmic.

 

I think that is your answer then

I'm sure that with a bit of thought and DIY, you could make a K&N of some shape fit

I personally would not even use an HKS filter on a lawnmower, having seen the amount of sticky oil that gets into the intake tract.

 

ok i`l try that everything is worth a shot and if it works i will personally send you a postal order to buy yourself a drink on me.

cheers paul

 

I am about to fit a hybrid FMIC to my MY00.

I have a large K&N cone which is much too big to fit in place of the airbox.

There is a 'flexi-pipe' between the MAF tube and the inlet pipe which i intend to replace with a cut down samco item, to give a bit more space.

If you look on www.samcosport.com , they refer to it as an airbox hose.

I'm sure you could do the same sort of thing

Regards

Richard

 

can i just ask how you know when your maf as gone wot happens to your car and wot dose it do?

 

the rev needle starts to drop when ticking over ...then when in boost the car cuts out completly and upon restarting the check engine light appears and the car is then in limp mode...basically you cant use the turbo...this just a safety thing to protect the engine.

 

thanks for that its nice to know just in case it happens