Failed Emission Test, Again & Again
#29
Rotary Enthusiast
I have just about everything done to my car:
850 pri 1600 sec injectors
AEM EMS
RX6 single turbo (running 18psi)
DP, midpipe with muffler
FMIC
Removed all EGR related stuff
On test day, I just bolt the stock cat back on and run a hose directly fro the air pump into the cat. Do not drive around this way, this is for the test only, I just drive to the test station let them run the test and go home, pass every time. My numbers are as low as a Honda Civic. :-)
850 pri 1600 sec injectors
AEM EMS
RX6 single turbo (running 18psi)
DP, midpipe with muffler
FMIC
Removed all EGR related stuff
On test day, I just bolt the stock cat back on and run a hose directly fro the air pump into the cat. Do not drive around this way, this is for the test only, I just drive to the test station let them run the test and go home, pass every time. My numbers are as low as a Honda Civic. :-)
#34
I am having similar problems... Mazdatrix says on there website that if HC and CO are high and won't pass smog, the ACV is the culprit. From the look of your numbers this may be your problem. What are the numbers for NOX? Does the exhaust smell of fuel like it running rich?
You can check both the Airpump and the ACV. Read the "Secondary air injection" section in the FSM. I removed the ACV to check and found that the vacuum line to my Pressure regulator control S. V. was disconected (Never hooked up by the shop that just rebuilt my engine). I'm in the process of hooking it all back up.
You can check both the Airpump and the ACV. Read the "Secondary air injection" section in the FSM. I removed the ACV to check and found that the vacuum line to my Pressure regulator control S. V. was disconected (Never hooked up by the shop that just rebuilt my engine). I'm in the process of hooking it all back up.
#35
Full Member
Thread Starter
Join Date: Apr 2001
Location: Hillsboro, OR, USA
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Daniel577h
post all your numbers off that sheet not sure how much different it is that a CA emmissions test
#36
Full Member
Thread Starter
Join Date: Apr 2001
Location: Hillsboro, OR, USA
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dlarson101
I am having similar problems... Mazdatrix says on there website that if HC and CO are high and won't pass smog, the ACV is the culprit. From the look of your numbers this may be your problem. What are the numbers for NOX? Does the exhaust smell of fuel like it running rich?
You can check both the Airpump and the ACV. Read the "Secondary air injection" section in the FSM. I removed the ACV to check and found that the vacuum line to my Pressure regulator control S. V. was disconected (Never hooked up by the shop that just rebuilt my engine). I'm in the process of hooking it all back up.
You can check both the Airpump and the ACV. Read the "Secondary air injection" section in the FSM. I removed the ACV to check and found that the vacuum line to my Pressure regulator control S. V. was disconected (Never hooked up by the shop that just rebuilt my engine). I'm in the process of hooking it all back up.
The last read out I got do not show a NOX#. See PDF File. I will check both the Airpump and the ACV. tonight.
#39
Full Member
Thread Starter
Join Date: Apr 2001
Location: Hillsboro, OR, USA
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by mazdatim
CO STD (Says 1 which is a %) and HC STD (shows 220) should be the limits. Very similar to WA limits. You weren't too far off @2500rpm for HC. Your biggest problem was at idle, just like mine. And there's a lot of CO in your exhaust (3.? and 4.? %)...
#40
Full Member
Thread Starter
Join Date: Apr 2001
Location: Hillsboro, OR, USA
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by charlies7
try throwing the stock ecu back. IIRC isnt the M2 ecu very conservative no matter how the car is driven ie boost, cruise etc?
#42
Full Member
Thread Starter
Join Date: Apr 2001
Location: Hillsboro, OR, USA
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
I think I found the problem, the gaket between the ACV and the LIM was leaking. The round oneway valve between the ACV and LIM was not centered. I did a vacum test on both valve and they are working correctly. After replacing the gasket I'll know for sure, if I did find the problem or not.
I would have never found this without the help of the the forum. Thanks everyone.
I would have never found this without the help of the the forum. Thanks everyone.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
alexdimen
3rd Generation Specific (1993-2002)
20
10-23-15 01:50 PM