Help doing a Drive Cycle
Thread Starter
Instructor
Joined: Dec 2009
Posts: 164
Likes: 3
Help doing a Drive Cycle
I have a 2013 427 Anniversary Corvette and it is a Garge Queen.
This past Summer I replaced the battery and in doing so the battery was disconnected for over a day.
After installing new battery I went for my NJ State Motor Vehicle Inspection.
I was asked if I had battery disconnected recently and I said yes long enough to install new battery.
I was told I had to drive my car through a Drive Cycle session, and then they gave me instructions.
I did a few and went back three days later, I failed again and was told to do more of the same.
I still have not passed but was told I had to have one more Sensor reset.
What am I doing wrong that it is taking me so long to complete this ? .
This past Summer I replaced the battery and in doing so the battery was disconnected for over a day.
After installing new battery I went for my NJ State Motor Vehicle Inspection.
I was asked if I had battery disconnected recently and I said yes long enough to install new battery.
I was told I had to drive my car through a Drive Cycle session, and then they gave me instructions.
I did a few and went back three days later, I failed again and was told to do more of the same.
I still have not passed but was told I had to have one more Sensor reset.
What am I doing wrong that it is taking me so long to complete this ? .
Melting Slicks
Joined: Nov 2009
Posts: 3,298
Likes: 1,153
From: Klein TX
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
Just been there/done that and I feel your pain, it can be frustrating. The C6 has 7 I/M monitors that need to show "ready" or "yes" when the car's ECU is scanned at the state emissions inspection station. Most of the tests run in a few drive cycles after a battery disconnect or DTC code clear, but the Cat test can take a few more and the Evap test can seem to take forever. I've done the official GM drive cycle over and over with no success on that one.
What I've found does encourage the Cat test to run is the "drive at a sustained speed for a few minutes then stop and idle for a few minutes" part of the GM drive cycle. So highway driving or creeping in stop and go traffic didn't get it done but driving in Houston off peak suburban traffic for about 30min did.
There is a way to command the Evap test to run with a Tech2 if you have one, but as it turns out, it's not necessary to pass emissions.
The good news is you only need 6 of the 7 I/M monitors to show "ready" to pass emissions inspection in most states. So the dam Evap test can never run and you can still pass inspection, as long as everything else is OK. Texas is that way, don't know about Jersey. Check w/ your inspection guys and hopefully you only need 6.
Hope this helps, good luck.
What I've found does encourage the Cat test to run is the "drive at a sustained speed for a few minutes then stop and idle for a few minutes" part of the GM drive cycle. So highway driving or creeping in stop and go traffic didn't get it done but driving in Houston off peak suburban traffic for about 30min did.
There is a way to command the Evap test to run with a Tech2 if you have one, but as it turns out, it's not necessary to pass emissions.
The good news is you only need 6 of the 7 I/M monitors to show "ready" to pass emissions inspection in most states. So the dam Evap test can never run and you can still pass inspection, as long as everything else is OK. Texas is that way, don't know about Jersey. Check w/ your inspection guys and hopefully you only need 6.
Hope this helps, good luck.
Last edited by wjnjr; Feb 9, 2019 at 04:54 PM.
Thread Starter
Instructor
Joined: Dec 2009
Posts: 164
Likes: 3
Thank You, you gave me the kind of information I was looking for.
i’ll post outcome once I have time to try after the snow has gone away.
I learned a good lesson “never disconnect battery on newer vet”.
i’ll post outcome once I have time to try after the snow has gone away.
I learned a good lesson “never disconnect battery on newer vet”.
Intermediate
Joined: Nov 2013
Posts: 44
Likes: 5
From: S. Setauket N.Y.
I'm going thru the same thing with my 2007. just replaced a couple of things and cleared codes. After 75 miles the evap still isn't ready and now have a P060 on an O2 sensor I just replaced.
most states only require 6 of the 7 monitors
most states only require 6 of the 7 monitors
