Subaru Impreza WRX Classic Emission's Help
#1
Subaru Impreza WRX Classic Emission's Help
Hi
I am needing some help with my Impreza, It is a 1994 Classic Impreza WRX turbo
It is running standard ECU, Has a Apexi Filter on it, and a Blitz Nur Spec Exhaust with a high flow cat on it in the down pipe,
There is only a lamdba sensor in the headers. and not one after the turbo in the downpipe, the wiring is there but no sensor.
I have had it on the emissions today and the Lamdba is all over the place and the CO is running 10.2%... The limit is 0.3%
Do you think this is due to it not running a rear Lambda?
Thanks for you help
Cheers
Baz
I am needing some help with my Impreza, It is a 1994 Classic Impreza WRX turbo
It is running standard ECU, Has a Apexi Filter on it, and a Blitz Nur Spec Exhaust with a high flow cat on it in the down pipe,
There is only a lamdba sensor in the headers. and not one after the turbo in the downpipe, the wiring is there but no sensor.
I have had it on the emissions today and the Lamdba is all over the place and the CO is running 10.2%... The limit is 0.3%
Do you think this is due to it not running a rear Lambda?
Thanks for you help
Cheers
Baz
#3
#4
the sensor wiring in the down pipe will be the cat on fire sensor wiring. forget about that. not needed. suggest performance cat is duff or bad lambda sensor.
even with my standard downpipe it took a few attempts to get it through the mot (had to wait for cat to heat up).
even with my standard downpipe it took a few attempts to get it through the mot (had to wait for cat to heat up).
#6
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#9
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When I first start it up on a morning it wont idle properly for about 5mins, then its fine. it drives spot on, Cant fault it at all when driving, this is my 2nd one and this one is less economical than the first one I had,
#13
Cheers mate, I wondered about the temp sender, Is that under the inlet manifold?
I've got a spare front Lambda so may swap that over this week. Ihavent got one in the downpipe as yet though, finding it hard to find one that has two wires to match my car.
I have tried a different air flow meter so know its not that.
Cheers for your help
Baz
#14
Scooby Regular
iTrader: (52)
Cheers mate, I wondered about the temp sender, Is that under the inlet manifold?
I've got a spare front Lambda so may swap that over this week. Ihavent got one in the downpipe as yet though, finding it hard to find one that has two wires to match my car.
I have tried a different air flow meter so know its not that.
Cheers for your help
Baz
I've got a spare front Lambda so may swap that over this week. Ihavent got one in the downpipe as yet though, finding it hard to find one that has two wires to match my car.
I have tried a different air flow meter so know its not that.
Cheers for your help
Baz
hope this helps mate.
#15
baz
#17
Former Sponsor
iTrader: (48)
For what it will cost you, fit a new Lambda sensor in the headers at the collector nearest the driver's side wheel. That was the only Lambda sensor fitted to your model. Get it nice and hot and see if it will pass the MOT and remind the tester of your model year. Now if it still fails I suggest you need to find someone local to you that knows about Subaru WRX of that age and take it from there.
#18
Update on my WRX Impreza...
I have tonight swapped the Lambda sensor over in the Header with another one. It makes no difference at all the emissions. On idle the emissions are about 0.6CO and about 1.1 on Lambda, as soon as you bring the revs to 2500RPM the CO goes to 10.2 and the Lambda drops down to about 0.5 which is too low... Does anyone have any other thoughts.
Also I have now noticed on the ECu it has a Mines ECU on it.... Could this be my problems??
Cheers
Baz
I have tonight swapped the Lambda sensor over in the Header with another one. It makes no difference at all the emissions. On idle the emissions are about 0.6CO and about 1.1 on Lambda, as soon as you bring the revs to 2500RPM the CO goes to 10.2 and the Lambda drops down to about 0.5 which is too low... Does anyone have any other thoughts.
Also I have now noticed on the ECu it has a Mines ECU on it.... Could this be my problems??
Cheers
Baz
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