Possible OBD Emissions Cheat
03-28-2010, 07:45 PM
#1
Possible OBD Emissions Cheat
Some of you may remember that my plan was to title my Z in FL to avoid emissions testing here in PA. I've been getting by on a 5K per year exemption, but want to get some true seat time and miles in this year, so the 5K is a FAIL.
My solution is buying a second speedo cluster. I matched my year and trans and bought a used cluster (thanks thawk408). I get tested and get my exemption sticker using my stock cluster, then swap the speedo clusters and drive as much as I want. Swap the clusters back before inspection next year and renew my exemption by easily staying under the milage restriction.
I swapped clusters the other day and eveything seems to be working fine and milage is recording on the new odo just fine. I will drive it like this for a week or so and then swap back to be sure their are zero issues and my original odo retains the proper milage.
I am fully aware that this is basically odometer tampering, but I've pretty much modified or destroyed the resale value on every piece of the car already and it will most likely be parted out if I ever get rid of it. The upside is that because I am exempt from emissions, it doesn't matter a bit if I throw codes or have no cats, now I just need to get Acree to do the LED mod for me on the new cluster
This may not work in every state, but if you have the exemption loophole it may be a viable option. I will update the tread if I find any glitches or can 100% verify that there are no issues.
My solution is buying a second speedo cluster. I matched my year and trans and bought a used cluster (thanks thawk408). I get tested and get my exemption sticker using my stock cluster, then swap the speedo clusters and drive as much as I want. Swap the clusters back before inspection next year and renew my exemption by easily staying under the milage restriction.
I swapped clusters the other day and eveything seems to be working fine and milage is recording on the new odo just fine. I will drive it like this for a week or so and then swap back to be sure their are zero issues and my original odo retains the proper milage.
I am fully aware that this is basically odometer tampering, but I've pretty much modified or destroyed the resale value on every piece of the car already and it will most likely be parted out if I ever get rid of it. The upside is that because I am exempt from emissions, it doesn't matter a bit if I throw codes or have no cats, now I just need to get Acree to do the LED mod for me on the new cluster
This may not work in every state, but if you have the exemption loophole it may be a viable option. I will update the tread if I find any glitches or can 100% verify that there are no issues.
03-29-2010, 04:30 AM
#5
Whatever... I'm sure the emissions police are on their way over right now. Funny that you are from CA, every member of your state that has a turbo is breaking the law as well.
Just trying to help, each state is different.
I tried this at every place I could find, but the OBD port plugs right into a computer that is connected to the state database. Can't bribe a machine 
Not all of us have mileage exemptions though, here in MD you have to be a senior citizen to qualify for that.
Nice! I wish the UK had exemption laws! We just do it the old fashion way and bribe people! lol..
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03-29-2010, 06:42 AM
#8
This is where many people are given mis-information that bites them in the a$$ when inspection comes due. You can turn off the CEL lights with a reflash, but the code still exsists. Or you can turn off the sensor from sending the signal, but then it shows as pending or not ready when you plug in for the OBD test. Pending signals = FAIL.
Our cars have appx a 50 mile drive cycle for all the sensors to report after you clear codes. For the majority of us in F/I, you will get one of the common codes for cam timing or random misfire not matter how you drive the car.
What I am saying with the method I am using is that the codes no longer matter because I am exempt from emissions and just need to pass the mechanical inspection such as tires and turn signals.
Our cars have appx a 50 mile drive cycle for all the sensors to report after you clear codes. For the majority of us in F/I, you will get one of the common codes for cam timing or random misfire not matter how you drive the car.
What I am saying with the method I am using is that the codes no longer matter because I am exempt from emissions and just need to pass the mechanical inspection such as tires and turn signals.
03-29-2010, 07:35 AM
#10
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why doesnt your car pass emissions in PA? my car passed the sniffer test with test pipes and s/c. i only failed the visual but i found a way around that. i switched to hfc's and now have no problems at all.
03-29-2010, 07:41 AM
#11
I know Cobb and Osirus can keep certain codes from coming back on. PO420 and such. I thought I was told Haltech has the same capibilities? I guess I'm mistaken.
I know about pending codes, its the same reason people fail when they try to disconnect the battery right before an Inspection. I thought these even took care of that.
I know about pending codes, its the same reason people fail when they try to disconnect the battery right before an Inspection. I thought these even took care of that.
03-29-2010, 09:54 AM
#15
I doubt Techno would turn codes off permanently, that would be illegal in the case of emissions, such as having them turn off the ability for o2 sensor and cam timing codes to be displayed.
Of course if a company like Techno and Osiris can reflash ECU's they can alter speed and rev limiters and turn codes off but that wont stop the car from producing them again after driving.
Of course if a company like Techno and Osiris can reflash ECU's they can alter speed and rev limiters and turn codes off but that wont stop the car from producing them again after driving.
03-29-2010, 11:18 AM
#16
To clear a couple things up:
Haltech 350Z can not currently turn on or off codes, nor can FCON, ProEFI, etc. Haltech is able to do it on other applications (such as R35 GT-R), but this has yet to be implemented on the 350Z.
With our reflash, we can disable codes permanently. This works for emissions tests too, unless you turn off a readiness-related code. For example, turning off the o2 sensor codes will prevent those codes from ever showing up again, but the readiness test will never show "Ready" either because the error checking (DTC) for O2s is gone. Some states allow 1-3 "not ready"s.
Haltech 350Z can not currently turn on or off codes, nor can FCON, ProEFI, etc. Haltech is able to do it on other applications (such as R35 GT-R), but this has yet to be implemented on the 350Z.
With our reflash, we can disable codes permanently. This works for emissions tests too, unless you turn off a readiness-related code. For example, turning off the o2 sensor codes will prevent those codes from ever showing up again, but the readiness test will never show "Ready" either because the error checking (DTC) for O2s is gone. Some states allow 1-3 "not ready"s.
