After header Install?
Thread Starter
Drifting
Joined: Feb 2006
Posts: 1,600
Likes: 2
From: Outer banks North Carolina
After header Install?
Installed longtube headers, x-pipie etc.. on my "99" automatic coupe.
The car runs great but I removed the A.I.R. system and blocked off the flanges on the headers with the blockoff plates and after a day i got the check engine light. checked codes and got code p-1415 and p-1416 which I cleared. I re- installed the A.I.R. system and the check engine light has not returned. My question is does it make any difference in the performance of the car whether or not the A.I.R. system is hooked up or is it just cosmetically better and cleaner looking? I don't want to get a dyno tune right now but I know they can tune out the A.I.R. stuff when they do a tune. The car just didn't seem to run as strong after i put the A.I.R. stuff back on but It could be my imagination I suppose
Dave
The car runs great but I removed the A.I.R. system and blocked off the flanges on the headers with the blockoff plates and after a day i got the check engine light. checked codes and got code p-1415 and p-1416 which I cleared. I re- installed the A.I.R. system and the check engine light has not returned. My question is does it make any difference in the performance of the car whether or not the A.I.R. system is hooked up or is it just cosmetically better and cleaner looking? I don't want to get a dyno tune right now but I know they can tune out the A.I.R. stuff when they do a tune. The car just didn't seem to run as strong after i put the A.I.R. stuff back on but It could be my imagination I suppose
Dave
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Its a severe case if IMAGINATIS!!
The AIR system has NOTHING POSITIVE or NEGATIVE to do with power, performance or idle.
All it does is inject cold fresh air into the exhaust at cold start to speed up CAT light off. Then its suppose to shut off after a few minutes.
It does run at certain times during cruise as a PCM directed test. It changes the primary O2 Sensor readings a specific amount. The PCM knows how much its suppose to change and that test is used to test the output of the A.I R. system and to make sure it working correctly.
So,, it shouldn't have any effect.
BC
BC
The AIR system has NOTHING POSITIVE or NEGATIVE to do with power, performance or idle.
All it does is inject cold fresh air into the exhaust at cold start to speed up CAT light off. Then its suppose to shut off after a few minutes.
It does run at certain times during cruise as a PCM directed test. It changes the primary O2 Sensor readings a specific amount. The PCM knows how much its suppose to change and that test is used to test the output of the A.I R. system and to make sure it working correctly.
So,, it shouldn't have any effect.
BC
BC
Thread Starter
Drifting
Joined: Feb 2006
Posts: 1,600
Likes: 2
From: Outer banks North Carolina
Its a severe case if IMAGINATIS!!
The AIR system has NOTHING POSITIVE or NEGATIVE to do with power, performance or idle.
All it does is inject cold fresh air into the exhaust at cold start to speed up CAT light off. Then its suppose to shut off after a few minutes.
It does run at certain times during cruise as a PCM directed test. It changes the primary O2 Sensor readings a specific amount. The PCM knows how much its suppose to change and that test is used to test the output of the A.I R. system and to make sure it working correctly.
So,, it shouldn't have any effect.
BC
BC
The AIR system has NOTHING POSITIVE or NEGATIVE to do with power, performance or idle.
All it does is inject cold fresh air into the exhaust at cold start to speed up CAT light off. Then its suppose to shut off after a few minutes.
It does run at certain times during cruise as a PCM directed test. It changes the primary O2 Sensor readings a specific amount. The PCM knows how much its suppose to change and that test is used to test the output of the A.I R. system and to make sure it working correctly.
So,, it shouldn't have any effect.
BC
BC
Racer
Joined: Feb 2003
Posts: 418
Likes: 28
From: Evansville IN
It does run at certain times during cruise as a PCM directed test. It changes the primary O2 Sensor readings a specific amount. The PCM knows how much its suppose to change and that test is used to test the output of the A.I R. system and to make sure it working correctly.
BC
BC
Thanks,
Steve
