So, if you monitor the mixture and detting it *may* suggest a duff MAF and prevent your engine going pop ??

And what is the best way of monitoring these?

DeltaDash I know is very good, but not convienient to run in the car all the time.

Stefan

I would be interested in hearing from anyone who has had such a fault and had it repaired by Subaru. It would be useful for me to quote a real incident that they will have on their records... please e-mail me if anyone has such info.

Cheers, MKC

An AFR meter can tell you if you're running lean, so would show the syptoms of the MAF going bye-byes.

Jamie Whitfield from JW Racing / PerformanceExhausts.net has some good AFR meters in stock. I think they're called a Dawes AFR. Also Bob from BR developments has the lambda link AFR meters, which are also great. Any of these will help monitor your fuel mixtures so that you can catch a failing MAF before it does serious damage.

Cheers,

Wrexy.

http://www.scoobynet.co.uk/bbs/threa...D=72098&Page=2

Look at the 14th post by MRK Impreza.

In this post Subaru NL were blaming the MAF. I will try and now locate the other topic where Mark came back and said that it was the MAF.

Cheers,

Wrexy.

OK,

Read Mark's posts here. http://www.scoobynet.co.uk/bbs/threa...ThreadID=92652

Cheers,

Wrexy.

If you're as lazy as me, linkhere.
It's good enough to diagnose remotely that your carpet has rucked up under the accelerator :D.
[edited 'cos I posted at the same time as wrexy ;)]

[Edited by nom - 7/9/2002 3:00:15 PM]

nom,

Just seen your post. If I had seen the link you fixed, I'd have left mine unchanged. I'll change it back. ;) :D

Great minds think alike. :D

Wrexy.


[Edited by WREXY - 7/9/2002 3:04:53 PM]

I have just spoken to the dealer (they have been very helpful)and apparently a Subaru Inspector (seperate from the dealer) has had a look at the burnt scored cylinder and piston. As far as I am aware, they believe that an ECU fault (not previously encountered in the UK, but on Bulletins to rest of Europe) is the most likely cause of the problem.

I have a feeling that the entire engine/turbo etc will be replaced again, along with a new ECU this time. I do not think they are going to approve the replacement of the other sensors as they all pass the select monitor tests.

I am a bit uneasy with this as the car has had 50k miles of hard driving with no engine failures at all. We will see how things progress...!!

I also mentioned the MAF fault and was told that you usually get flat spots prior to or related to a MAF fault and that its unlikely. I must admit that the car was running perfectly after the last engine was installed (up to the day it went bang !!).

MKC

[Edited by MKC - 7/10/2002 12:39:58 PM]

I would fit a lambdalink to any scoob,at least then if you give it some WOT and the last light does not light up you know you have leaned out.

my own theory to why later engines melt is high speed runs not feeding the intercooler and leaner fuelling due to a faulty/contaminated MAF.john banks logged my standard ecu car and said I was running 14/15%rich so I think I might get away with long high speed runs(no I do not risk it)but if I had a faulty MAF giving fuelling of 6% plus crap air flow at high speeds then I think my engine would let go fairly quickly.



[Edited by T-uk - 7/10/2002 4:34:52 PM]