UpRev and Inspection

elhombre · 03-06-2024, 02:31 PM

Hey everyone! I just had my tuner install ISR HFCs on my 09 370z.

The car was throwing a P0420 for catalyst efficiency, so I thought it was a good excuse to upgrade.

My tuner suggested that he could put in the O2 defoulers to keep the codes away or he could "disable" the codes (P0420/430), which he did for my P0300 code and I have had no trouble with passing inspection. I told him to just do the codes as the defoulers seem to be a hit or miss.

However, I am concerned that this will be different with P0420/430. My question is, will I pass inspection or is there something else I should do to make sure I am 100% before getting the car inspected.

Inflaymes · 03-07-2024, 01:06 AM

a little bit of steel wool in the defoulers works like a charm. I have some on my jeep.

2011 Nismo#91 · 03-07-2024, 05:51 AM

Some State emissions like NJ automatically fail you if you have an emissions sensor disabled. CT could be different though each state has their own rules. There is something called mini Cats that could resolve your issues without having to disable anything.
I used these and they have been working well. There may be other options available out there.
O2 Simulator Mini Cat Cel Fix stainless steel Rear O2 sensor simulator.

seymore4 · 03-07-2024, 11:38 AM

You'll most likely fail. Disabling any O2/ exhaust codes in the tune causes the O2 monitors to show up as "not ready" when they do the OBD2 scan.

abm89 · 03-07-2024, 12:45 PM

I suggest getting a tuner who can tune your car without disabling the sensors. It's entirely possible with ECUtek at least.

ZoomZ · 03-07-2024, 01:40 PM

Quote:

Originally Posted by seymore4

You'll most likely fail. Disabling any O2/ exhaust codes in the tune causes the O2 monitors to show up as "not ready" when they do the OBD2 scan.

or an "impending" code(s) shown on data reader.

seymore4 · 03-11-2024, 11:43 AM

Quote:

Originally Posted by abm89

I suggest getting a tuner who can tune your car without disabling the sensors. It's entirely possible with ECUtek at least.

Its entirely possible with Uprev as well. This guy chose to disable them for convenience... when they SHOULD know that it will not pass emissions testing in their state. Pretty bad business practice IMO

03-06-2024, 02:31 PM	#1 (permalink)
elhombre Base Member Join Date: Feb 2016 Location: CT Posts: 93 Drives: 2009 370z Rep Power: 145	UpRev and Inspection Hey everyone! I just had my tuner install ISR HFCs on my 09 370z. The car was throwing a P0420 for catalyst efficiency, so I thought it was a good excuse to upgrade. My tuner suggested that he could put in the O2 defoulers to keep the codes away or he could "disable" the codes (P0420/430), which he did for my P0300 code and I have had no trouble with passing inspection. I told him to just do the codes as the defoulers seem to be a hit or miss. However, I am concerned that this will be different with P0420/430. My question is, will I pass inspection or is there something else I should do to make sure I am 100% before getting the car inspected.

03-07-2024, 01:06 AM	#2 (permalink)
Inflaymes Base Member Join Date: Mar 2018 Location: Des Moines, Iowa Posts: 162 Drives: 2014 370z Nismo Rep Power: 7051	a little bit of steel wool in the defoulers works like a charm. I have some on my jeep. __________________ 2014 370z Nismo Fairlady \| Gold Powdercoated Nismo Rays \| Z1 Ported Manifold \| RJM Adjustable Clutch Pedal \| Berk Test Pipes \| Beluga Racing Exhaust \| Custom Billetworkz Imperial Sledge Shift Knob \| Carbon Fiber, Flat-Bottom Steering Wheel \| Ecu-Tek Custom Tune

03-07-2024, 05:51 AM	#3 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,400 Drives: slowly Rep Power: 40569	Some State emissions like NJ automatically fail you if you have an emissions sensor disabled. CT could be different though each state has their own rules. There is something called mini Cats that could resolve your issues without having to disable anything. I used these and they have been working well. There may be other options available out there. O2 Simulator Mini Cat Cel Fix stainless steel Rear O2 sensor simulator. sx moneypit and elhombre like this. __________________ GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs

03-07-2024, 11:38 AM	#4 (permalink)
seymore4 Track Member Join Date: Nov 2010 Location: West coast Age: 41 Posts: 556 Drives: 2010 nismo Rep Power: 6727	You'll most likely fail. Disabling any O2/ exhaust codes in the tune causes the O2 monitors to show up as "not ready" when they do the OBD2 scan. elhombre and ZoomZ like this.

03-07-2024, 12:45 PM	#5 (permalink)
abm89 A True Z Fanatic Join Date: Feb 2013 Location: Austin, Texas Posts: 1,386 Drives: 11 370Z \| 24 EL450 Rep Power: 64763	I suggest getting a tuner who can tune your car without disabling the sensors. It's entirely possible with ECUtek at least. elhombre likes this. __________________ Complete Parts List: https://github.com/abm89/ztouge-build

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