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bullitt4110 · 07-02-2021, 03:25 PM

I recently bought a 2019 ZL1 1LE and I’m needing to have it pass an emissions test to get it registered. The fuel and evap monitors are not becoming ready. The car has headers and the rear o2’s were left out previously so I installed some new o2’s which cleared some “permanent” codes but after 400-500 miles and multiple tanks of fuel and trying to drive at different MPH’s to get them to set nothing has helped. The car does have a flex fuel sensor, could that be the issue? I’ve had cars pass the test in the past with flex sensors but nothing this new. Any suggestions?

07-02-2021, 03:25 PM	#1
bullitt4110 Drives: 2019 ZL1 1LE Join Date: Apr 2011 Location: Vacaville, CA Posts: 24	Emissions monitors I recently bought a 2019 ZL1 1LE and I’m needing to have it pass an emissions test to get it registered. The fuel and evap monitors are not becoming ready. The car has headers and the rear o2’s were left out previously so I installed some new o2’s which cleared some “permanent” codes but after 400-500 miles and multiple tanks of fuel and trying to drive at different MPH’s to get them to set nothing has helped. The car does have a flex fuel sensor, could that be the issue? I’ve had cars pass the test in the past with flex sensors but nothing this new. Any suggestions? __________________ 2019 ZL1 1LE - satin steel gray metallic M6 2009 Z06 - sold