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After reading Gambits post regarding fault codes, I have done the black plug connection and its two long blinks and three quick ones. It keeps repeating the same over and over. 

I now know (thanks to Gambit again) that its probably the MAF sensor that is faulty, or maybe the wiring harness connected to it.

The previous owner has put a k/n panel filter in it and after some reading on here and our magic friend mr google I think maybe the oil that coats the filter has fouled the MAF. 

 

The symptoms I have are below:

 

Rough Idling. 

fuel smell at idle.

car runs very rough when cold (feels like misfire and jerking at low revs when driving in low gear).

can feel a misfire when sitting at a constant 65 on the motorway.

 

But the car revs well and has plenty power under load. So would a faulty MAF cause all those symptoms ? or should I change the plugs, leads and maybe coil pack.

 

I was told by the previous owner that the only mods done were a stainless decatted exhaust system and a k/n filter.

It also has had a new cambelt fitted and its only done 280 miles since.(done by previous owner).

 

I want to get this sorted so that I can enjoy driving the car 

 

 

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It's very possible with the car running pull the plug off the MAF to see if it stalls out 

There is a few things that can be linked to poor idling but if it's had an oiled filter in I would put money that is where the problem is :( 

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If it's been decatted and had a different filter should have had a remap, I'd pop in a standard paper filter in and give it a service, see how it goes, then try replacement maf, what colour sticker si on the maf housing ?

Sent from my SM-T210

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Going out to take a few photos just now Stanton. Is there 2 cats on the car? I will post the images in 20 minutes. Engine is a bit grubby looking but I will get it all nice once I get it running proper. I have all the service history and all previous mot's etc. Its done 111,000 miles.  

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Normally when the plug is pulled and a stall occurs this means it's working, it's not the best test but it gives an indication,

Standard exhaust there's one just behind the turbo and another one underneath the car in the 2nd section, the milage is nothing for these if they have been looked after [emoji3]

Sent from my SM-T210

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There are no other markings on the maf Stanton. But I did find a broken wire which was tie-wrapped to the maf wiring loom. The image shows the break in circles and the arrow is where the wire joins the loom. I do not know what this wire is for but I have cut off the green corroded ends and joined the ends back up properly. Will test the car tomorrow. Thanks for your help post-2587-0-62783700-1402864931_thumb.jp

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I have heard mention of people using Nissan mafs due to them being cheaper. It's possible that's what has happened here. I don't know if they are two or three wire but it could explain it.

From the other side of the problem, any oiled air filters are bad for subaru mafs. The particulates of oil in the air flow, gradually deteriorate the metal strip in the MAF. I don't think it's a case of corrosion. It's more a case that oil eventually fully coats it and reduces it's ability to measure the air flow.

In your picture of the MAF plug, it clearly shows 3 wires. I can't see the middle one due to the wrapping. Is that wire the same colour as the broken one you found?

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I have heard mention of people using Nissan mafs due to them being cheaper. It's possible that's what has happened here. I don't know if they are two or three wire but it could explain it.

From the other side of the problem, any oiled air filters are bad for subaru mafs. The particulates of oil in the air flow, gradually deteriorate the metal strip in the MAF. I don't think it's a case of corrosion. It's more a case that oil eventually fully coats it and reduces it's ability to measure the air flow.

In your picture of the MAF plug, it clearly shows 3 wires. I can't see the middle one due to the wrapping. Is that wire the same colour as the broken one you found?

 

 

Its a grey wire and its not from the maf loom. Its only held on to it with a tie strap. The wire runs towards the radiator. I never had time to have a look at work because I had a few MOTs to do and fit a power steering pipe to a ford fiesta   :unsure:

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The wire was for the alarm switch on front panel to stop theft of engine parts I presume . On another note, I have replaced the air filter panel with an original and bought NGK platinum plugs ( not fitted yet). I managed to connect our works OBDII computer to it using an adapter that plugged into the yellow 9 pin plug thats under the steering column. The MAF showed up as a fault in history only and there were no current engine problems with Ignition on. I started the car and went through the computer again and it came up with the fault (Injector number 4 faulty). the Launch diagnostic kit is ace  :) . I have put the car back off the road for now until I get a few things sorted. I want to put new injectors in, the new plugs, Clean the throttle body, fit original exhaust because I want it to be a classic original one day. So its back to my tuned bmw 318 tds for now  :wacko: I am also going to check the cam timing marks are all aligned. A new coil pack and leads will be fitted too. The car needs a couple of bits of bodywork done but I am going to keep a running update in a post (where can i post it) including images of all the work done making this a modern classic in original condition.

Do you think I am wise doing this  :rolleyes:

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Interesting news on the 9 pin adaptor, I take it being a garage you have an all singing all dancing diagnostic package,

As a long shot bases on your findings I've just ordered a subaru 9 to 16 pin adaptor from the bay if it doesn't work with the cheap softwarer I have then no loss if it does, opens up a whole new avenue for classic owners.

Thanks :-D

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Interesting news on the 9 pin adaptor, I take it being a garage you have an all singing all dancing diagnostic package,

As a long shot bases on your findings I've just ordered a subaru 9 to 16 pin adaptor from the bay if it doesn't work with the cheap softwarer I have then no loss if it does, opens up a whole new avenue for classic owners.

Thanks :-D

We have two systems. The bigger system is OBDII only but we have a system called launch that has various connectors I will show you the adapter I used. Oh and if it asks for 16 pin or 9 pin, select 9 pin  ;)

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Number four looks like its not been firing properly as you say. And it does look a little rich. Im new to subaru and Im also mainly a diesel specialist. My ignition timing is at 12 degrees, is that correct for my car. Also when on the computer the knock sensor was showing no value. it was at 0 

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Not sure I'll let somone with more knowleged answer that, do you have the sticker on the underside of the bonnet regarding timing ? I'm sure mine says 14 degrees but could be wrong [emoji52] as that could be for autos, if no ones answered by the morning i'll have a look

Sent from my SM-T210

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