Mazda forever

Hi rx7 lover,
i have a problem with my rx7 fd emission.
in Switzerland we must pass a pollution control,
and when I try to pass the pollution control the values are very very high at idle.
for pass the control the value must be:
CO: less than 0,1%. Actually I have 5% of CO
HC: less than 50ppm. Actually I have 800ppm
CO2: up than 12%. Actually I have 11%

the engine got a rebuild with street port and power fc and it running very fine.
i try already with the stock ECU but result is same.

i need help, or advice.

DaleClark

iTrader: (55)

Do you have the air pump hooked up and a good main cat?

Dale

tomatoto

Even with the air pump and cat, I guess it's not easy to pass those emissions values... Here in France we have 3,5% for the CO on a 93 FD... It's a lot of room, compared to the 0,1% they ask for you.

If you don't have the Air Pump and a Cat with the air inlet, I guess the best thing to do would be a bottle of whiskey left in the glove compartment before the MOT...

arghx

iTrader: (3)

If the air pump and cat are working, you can pass no problem. It should be running port air at idle (air pump puts air in the exhaust manifold, which oxidizes the HC and CO).

j9fd3s

iTrader: (3)

+1 a typical FD will be close to 0% CO and 5-50 HC's...

the air pump MUST be in "Port Air" the air pump air is going to the exhaust ports. the Factory cat is nearly bulletproof (i think if you shot it you would still pass emissions) its easily the strongest part on the car.

you also might change the o2 sensor, it matters

arghx

iTrader: (3)

What is the test cycle you have to pass? Is it just idle, or steady vehicle speed on a dyno, or is there a drive cycle?

Mazda forever

First, i want to say thanks to everyone who is helping me here!!!



I have try with both ecu stock one, and the pfc ,

I have exactly the same result with the emission test, and the O2 sensor will always showing static between 0.6 and 0.9V that s mean I am a way too rich

But once or twice I did pass the emission test perfectly for 1minutes with no reason,

- I am thinking about (PAC) port air control
at idle on the pfc controller will show the PAC is off , as soon as I am driving and put throttle in gear the PAC will turn on, and I can see that my O2 sensor values are changing like normal value move lean/rich

I am getting confuse,

Is the PAC should be on at idle or not!?

What about the relief control valve!?

And how to be sure that the air pump will blow air into the right place

Are you guys know if it s a way to open the port air and make the emission pass ?

Mazda forever

my cat is working and the air pump too at idle ( if I disconnect air pump my values going higher),
Maybe something about port air control like a solenoid or something like that.
on the pfc commander the PAC control show it off at idle, is it normal?

gracer7-rx7

iTrader: (16)

Could your O2 sensor need replacement?

Mazda forever

I think the o2 senor is working, because when I drive, the o2 value on the commander move like normal learn/rich. And when I press the clutch or at idle when car not move the value going directly to 0,91v and not move, like if the exhaust port air doesn’t work good and don’t give air for burn the exhaust gaz, but it’s just what I think. With the pfc the o2 sensor isn’t use.