impreza running rough as guts/backfiring

GTFOZZY · Post by **GTFOZZY** » Sun Jan 22, 2012 10:44 am

hey there does it just keep repeating itself or does it eventually stop altogeter let it go for 20 secs and it read one long and two short flashes :/

RSR 555 · Post by **RSR 555** » Sun Jan 22, 2012 6:14 pm

It will continue to scroll through all codes but yours appears to have just the one.. #12

Ok.. Code 12 is the Ignition Start Signal, so I'd replace you Ignition Relay.

This is the little light brown coloured relay behind your inside fuse box (bottom RHS of your dash). I'd see if you can borrow someones that is known to be good, as they aren't cheap to buy. Thinking about it, someone made a post relating to changing them for standard 87a relays.. let me see it I can find it.

RSR 555 · Post by **RSR 555** » Sun Jan 22, 2012 6:18 pm

If you try the above and it works, try and do this conversion...
showthread.php?t=19809&highlight=ignition+relay

GTFOZZY · Post by **GTFOZZY** » Sun Jan 22, 2012 6:37 pm

thanks mate would this be causing said problems though?

RSR 555 · Post by **RSR 555** » Sun Jan 22, 2012 9:37 pm

I'm going to say yes but very hard to tell over the net. This is why I'd try it first with a known good one, then make the changes if it works. I have seen Subarus do some weird sh*t when these Ignition Relays play up.

These Ignition relays are the same from the early Gen1 (BC/BF) and Gen2 (BD/BG) Libertys, early Imprezas (GC/GF model) and the early Foresters (SF models). Not sure what other ones use them but this should give you a good range of cars to try from.

You could also try going to your local wrecker and if you have a good rapport with them, they might let you try one first?

GTFOZZY · Post by **GTFOZZY** » Mon Jan 23, 2012 1:16 pm

I hate to ask but how much do you think a mechanic would charge if it does turn out to be the problem,i have had a look at a few wrecks on ebay see if they get back to me have to ring mate from all things soobaroo they have closed now but he may have some stuff laying around.

NachaLuva · Post by **NachaLuva** » Mon Jan 23, 2012 3:59 pm

Have you read the relay conversion thread? It seems pretty straightforward to do, esp if you have someone to help you who is confident with wiring...

showthread.php?t=19809&highlight=ignition+relay&page=2

Make sure you read the thread from post 1, it has all the necessary info. One of the later posts mentions problems similar to yours so I'd def give it a go. From whats been said on the thread, if you get a OEM relay from a wrecker, chances are you'd be putting in another faulty relay. You'd have to check its ok 1st. As Paul said, try one from a known fault free car.

Also, make sure you have a Jideco ignition relay, 2M (MR5A414A1K12V)

My personal opinion is do the conversion as its cheap, effective & not too hard.

GTFOZZY · Post by **GTFOZZY** » Mon Jan 23, 2012 4:50 pm

Yep prob will end up giving it a go wish i knew if a vortex one would suit got heaps them laying around unfortunatley no libs or suitable foz/impreza's .Anyways let you know how i go lol could be interesting :/

RSR 555 · Post by **RSR 555** » Tue Jan 24, 2012 1:39 am

GTFOZZY wrote:I hate to ask but how much do you think a mechanic would charge if it does turn out to be the problem,i have had a look at a few wrecks on ebay see if they get back to me have to ring mate from all things soobaroo they have closed now but he may have some stuff laying around.

I'm guessing too much, so best to try it yourself.

GTFOZZY · Post by **GTFOZZY** » Tue Jan 24, 2012 7:30 am

Thanks for all your help btw mate

GTFOZZY · Post by **GTFOZZY** » Thu Jan 26, 2012 11:52 am

Hi guys need a hand,have found the relay but wiring is different to the diagram on here.Can anyone help me out
[img]<div%20style="width:480px;text-align:right;"><embed%20width="480"%20height="360"%20src="http://static.pbsrc.com/flash/rss_slide ... ></a></div>[/img]

GTFOZZY · Post by **GTFOZZY** » Thu Jan 26, 2012 12:06 pm

http://s1260.photobucket.com/albums/ii562/impreza66/

GTFOZZY · Post by **GTFOZZY** » Thu Jan 26, 2012 12:08 pm

ok so the pic above is my relay can anyone help me figure out the wiring as it is not the same as the diagram above.

GTFOZZY · Post by **GTFOZZY** » Fri Jan 27, 2012 2:27 pm

Little help...anyone...plz lol

RSR 555 · Post by **RSR 555** » Fri Jan 27, 2012 4:51 pm

If I had the wiring diagram for your car then no sweat but I don't have one in front of me. Try search on here for a wiring diagram for your exact model.

GTFOZZY · Post by **GTFOZZY** » Fri Jan 27, 2012 8:26 pm

Arhhhhh I can't find one anywhere

NachaLuva · Post by **NachaLuva** » Fri Jan 27, 2012 9:00 pm

Yeah its not the same but very similar.

Gannon is very good with this kinda thing, maybe PM him.

Note that in your photo you're looking at the back of the plug where the wires come out which is the reverse of the diagram (plug face).

So at a guess (NOTE: GUESS), the wires on YOUR plug correspond to the diagram:
thin green: wire 2 - ECU switched power
thin black : wire 1 - ground
yellow/red : wire 4 - ECU
yellow/blue : wire 3 - various
black/red : wire 5 - fuel pump relay
black/red : wire 6 - fuel pump relay

Gannon · Post by **Gannon** » Wed Feb 08, 2012 9:00 pm

RSR 555 wrote:
Ok.. Code 12 is the Ignition Start Signal, so I'd replace you Ignition Relay.

Ah this may be incorrect, the start signal is what the ECU receives only while you are cranking the starter motor. Last time I checked my codes in my Outback, it was there too. I have not checked if it came back.

I'd be finding an ignition coil off a working car, along with new leads and trying that

Smokey · Post by **Smokey** » Wed Feb 08, 2012 9:52 pm

I was getting code 12 (lib MY96) due to very badly worn startor motor brushes. But I also had a dud ignition relay...

GTFOZZY · Post by **GTFOZZY** » Thu Feb 09, 2012 7:05 am

Hmmm I'm thinking mechanic just so I can find out the damm problem