Failed CA Smog check HC by 5 PPM
03-23-2012, 11:37 AM
#1
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Failed CA Smog check HC by 5 PPM
Hey guys, just tried to do a smog check and failed the ASM Emission Test on my E46 M3.
I passed on the 15 mph test but barely, Max 49 and i measured a 49, on the 25 mph test is where I failed, Max was 33 and i measured a 38. Any ideas what that would be?
car currently have 65,000 miles on it, drove the car for about 10 mins to the smog shop and idled for another 10 before testing, inspection 2 was done ~30k miles ago and inspect 1 was done 3000 miles ago along with 6 new coil ignitors since my oem ones went bad.
-Simon
I passed on the 15 mph test but barely, Max 49 and i measured a 49, on the 25 mph test is where I failed, Max was 33 and i measured a 38. Any ideas what that would be?
car currently have 65,000 miles on it, drove the car for about 10 mins to the smog shop and idled for another 10 before testing, inspection 2 was done ~30k miles ago and inspect 1 was done 3000 miles ago along with 6 new coil ignitors since my oem ones went bad.
-Simon
03-23-2012, 11:45 AM
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Do you have the stock cats/exhaust on it?
Honestly I would have just drove the car longer than 10min before going in. Your oil temp probably hadn't even got up into normal range in that amount of time. I'm guessing it also cooled down too much when it was idling for 10min.
I usually drive my car pretty hard for 20-30 min then roll into the smog shop.
Honestly I would have just drove the car longer than 10min before going in. Your oil temp probably hadn't even got up into normal range in that amount of time. I'm guessing it also cooled down too much when it was idling for 10min.
I usually drive my car pretty hard for 20-30 min then roll into the smog shop.
03-23-2012, 11:53 AM
#3
Do you have the stock cats/exhaust on it?
Honestly I would have just drove the car longer than 10min before going in. Your oil temp probably hadn't even got up into normal range in that amount of time. I'm guessing it also cooled down too much when it was idling for 10min.
I usually drive my car pretty hard for 20-30 min then roll into the smog shop.
Honestly I would have just drove the car longer than 10min before going in. Your oil temp probably hadn't even got up into normal range in that amount of time. I'm guessing it also cooled down too much when it was idling for 10min.
I usually drive my car pretty hard for 20-30 min then roll into the smog shop.
03-23-2012, 12:08 PM
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i'll try again over the weekend, going to drive it and warm it up more before testing. I'm on stock headers and cats and nothing has changed since i last smogged it and it passed with flying colors last 2 times. I didn't change the plugs when I changed the coilpacks because there were only 20k miles on them and ~30k now.
03-23-2012, 01:06 PM
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Here's what I've done before going in for smog.
Once I let the car get up to the normal operating temperature, I'll get on the freeway so you can get the car up to a good cruising speed. I'll drop it down to where I am staying at the same speed, but I'll increase the RPM's up to around 5K-6K and drive like that for about 1 - 2 minutes. Then I'll drop the RPM's back down by shifting back in to a higher gear. Do that about 2 - 3 times and I can notice that the cat is hot as you can feel the heat starting to warm the floor. That should pretty much burn off any build up of deposits. I'll do that on the way to the smog shop so that when I get to the smog shop even if the car sits for a little bit it should still be up at operating temperature. I've had good luck when doing that on the way to get smogged and have never been anywhere near failing numbers (that's with having only 1 High Flow Cat in the system).
YMMV
Once I let the car get up to the normal operating temperature, I'll get on the freeway so you can get the car up to a good cruising speed. I'll drop it down to where I am staying at the same speed, but I'll increase the RPM's up to around 5K-6K and drive like that for about 1 - 2 minutes. Then I'll drop the RPM's back down by shifting back in to a higher gear. Do that about 2 - 3 times and I can notice that the cat is hot as you can feel the heat starting to warm the floor. That should pretty much burn off any build up of deposits. I'll do that on the way to the smog shop so that when I get to the smog shop even if the car sits for a little bit it should still be up at operating temperature. I've had good luck when doing that on the way to get smogged and have never been anywhere near failing numbers (that's with having only 1 High Flow Cat in the system).
YMMV
03-23-2012, 01:49 PM
#11
If in doubt, FLAT OUT
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Federal Emissions Warranty - EPA420-F-96-020 - Covers these three specified major emissions control components for the first 8 years, or 80K miles on 1995 and newer vehicles:
*Catalytic converters;
*The electronic emissions control unit or computer (ECU);
*The onboard emissions diagnostic device or computer (OBD).
*Catalytic converters;
*The electronic emissions control unit or computer (ECU);
*The onboard emissions diagnostic device or computer (OBD).
03-23-2012, 03:47 PM
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Yeah, You've Probably Never Heard Of Me.
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putting this in bold and caps so everyone sees,
1 GALLON OF E85 WILL GET YOU PASSED SMOG!
posted this in the last smog thread, I've already gotten 3 cars that failed on HCs to pass by just adding one gallon of E85, you want about a 1:10 ratio to gas. I got my 84 GTI, 79 Porsche 911, and 98 2.5 RS through this way, DO IT!
1 GALLON OF E85 WILL GET YOU PASSED SMOG!
posted this in the last smog thread, I've already gotten 3 cars that failed on HCs to pass by just adding one gallon of E85, you want about a 1:10 ratio to gas. I got my 84 GTI, 79 Porsche 911, and 98 2.5 RS through this way, DO IT!
