Fire & skill
Vintage member
Anyone know where the auxillary air valve is located? c02 emmisions were at 5.1 today for mot, it failed on little things but need to get this sorted for my fresh ticket! Also is there an idle control valve on the car?
Aav
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Fire & skill
Vintage member
should mention its running a power fc now - so if theres a way to get the emmisions down at idle by adjusting the map - does anyone know?
any help appreciated!
any help appreciated!
bensmith907
New Member
its all under the plenum, hope you have small hands :lol:
http://nissan4u.com/parts/sunny/er_...chanical/secondary_air_system/illustration_1/
http://nissan4u.com/parts/sunny/er_...chanical/secondary_air_system/illustration_1/
Fire & skill
Vintage member
oh shit
Like the man says; it's mounted on the bottom of the plenum with three(?) hex-head nuts. - There's a solenoid to open/close the valve for fast idle to bring it to temperature, and the idle adjustment screw is in the end of it.
That's the puppy:
If it's high CO2 I'd go back and tell them they actually need to warm the car up before they test it... either that or give it a bit of a blast before you go in. - It's usually a sign of an incomplete burn, but if it's running (and idling) ok you probably don't want to go fiddling with the AAC valve; you can't adjust it because it's controlled by the ECU anyway.
That's the puppy:
If it's high CO2 I'd go back and tell them they actually need to warm the car up before they test it... either that or give it a bit of a blast before you go in. - It's usually a sign of an incomplete burn, but if it's running (and idling) ok you probably don't want to go fiddling with the AAC valve; you can't adjust it because it's controlled by the ECU anyway.
bensmith907
New Member
idle control valve isn't that bad. wouldn't want to do the aux air valve though
Fire & skill
Vintage member
might be an adjustment to the power fc thats needed - it was fine last year on the mines ecu
Fire & skill
Vintage member
wheres the idle control valve - is that down there too?
Less advance(20deg) and less fue reuired to hit 14.7 afrl, I had the same problem when mine idled at 40deg ign which is standard for the PFC. Is it particles, NOx or CO that it's failing on?
bensmith907
New Member
the picture is looking at the idle control valve
also all the valves are on this link i posted earlier
http://nissan4u.com/parts/sunny/er_...chanical/secondary_air_system/illustration_1/
also all the valves are on this link i posted earlier
http://nissan4u.com/parts/sunny/er_...chanical/secondary_air_system/illustration_1/
Fire & skill
Vintage member
sorry Ben, I did look at it but it only listed aav parts. I'm going to print it off
Fire & skill
Vintage member
I'm sure it was just CO
Are your AFR's good? Have you got closed loop control on your lambda sensor enabled?
"The IAA (Idle Air Adjusting) unit is made up of the AAC valve, the FICD solenoid, and idle adjusting screw" - Obviously the screw is about the only bit you can see with the engine in.
http://www.gtirworkshopmanual.com/default.aspx?v=839
Fire & skill
Vintage member
all done 
. . . . . . . . for another year
. . . . . . . . for another year
geoff pine
Well-Known Member
So how did you solve it :doh: ;-)