Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 General
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C5 General
General C5 Corvette Discussion not covered in Tech Sponsored by
Bud's Chevy

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 08-20-2011, 12:44 PM   #1
oneshot
CF Senior Member
 
oneshot's Avatar
 
Member Since: May 2007
Location: Round Rock TX
Default Failed Inspection test - catalyst not ready

Hey Guys,

I have been battling problem for the sometime now. I have taken my car in to get inspected several times to different places and each time I fail my state inspection. Each time my report comes back with the Catalyst and Evap systems as not ready.

I found on the forum GM's "drive" cycle instructions and ran through those. Still no luck.

Someone said to take it to a dealer and have them do a reset on the computer. I have a custom dyno tune on the car and the programmer told me this would wipe out his tune. Now before you start think it is the tune. I have had the tune on the car for over 3yrs. This would be the 4th inspection I had with the tune on it. So me and the programmer who is Cory at Henderson Performance do not think it is the tune.

So does anyone have any suggestions? I thought about disconnecting the battery and let the car set for a hour so that everything will reset on the car. Does that sound like a good idea?

I really need your help I am 2x months out of inspection and with school starting on Tuesday there will be cops everywhere.

Thanks
oneshot is offline   Reply With Quote
Old 08-20-2011, 01:40 PM   #2
01vetter
CF Senior Member
 
01vetter's Avatar
 
Member Since: Jul 2004
Location: Reading MA
Default

That doesn't sound right. You might want to post this in the Scan & Tune area. For some reason your computer isn't resetting after going through the ready cycle. I would suggest calling your tuner for suggestions.

I would check your battery, grounds and connections to the PCM. I am not an expert but if your PCM senses low or no voltage it will enter reset mode and you will get the "not ready" codes. I would disconnect the battery and try that. I think that you can read the codes from your dash readout so you can check for these codes before you go for an inspection. You may also have a problem with your PCM.

I hope this helps.
01vetter is offline   Reply With Quote
Old 08-20-2011, 01:45 PM   #3
Mr.Bill
We Miss You Frank...
St. Jude Donor '12-'13-'14
Support Corvetteforum!
 
Mr.Bill's Avatar
 
Member Since: Jul 2007
Location: Reno is so close to Hell you can see Sparks , State Of Confusion
Send a message via ICQ to Mr.Bill
Default

Check your gas cap and for vac leaks, Also pull your codes.
Mr.Bill is offline   Reply With Quote
Old 08-20-2011, 07:26 PM   #4
Aerovette
CF Senior Member
 
Member Since: Nov 2001
Location: From the windowwwwww to wall
Default

Quote:
Originally Posted by 01vetter View Post
That doesn't sound right. You might want to post this in the Scan & Tune area. For some reason your computer isn't resetting after going through the ready cycle. I would suggest calling your tuner for suggestions.

I would check your battery, grounds and connections to the PCM. I am not an expert but if your PCM senses low or no voltage it will enter reset mode and you will get the "not ready" codes. I would disconnect the battery and try that. I think that you can read the codes from your dash readout so you can check for these codes before you go for an inspection. You may also have a problem with your PCM.

I hope this helps.

Just to be sure you know...if you disconnect the battery you will need to do the drive cycle again. Also, the items on the drive cycle eventually all get covered in normal driving if you don't want to have to go through a specific routine and timeline.
Aerovette is online now   Reply With Quote
Old 08-20-2011, 09:06 PM   #5
nj02vette
CF Senior Member
 
nj02vette's Avatar
 
Member Since: Mar 2007
Location: Marlton. Increasing performance one speeding ticket at a time! NJ
Default

If the catalyst system is showing up as "not ready", then it's probably the rear O2 sensors aren't reporting correctly, or they are reporting correctly and the cats are going.

Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
nj02vette is offline   Reply With Quote
Old 08-20-2011, 09:15 PM   #6
87gtNOS
CF Senior Member
 
87gtNOS's Avatar
 
Member Since: Jun 2010
Location: Toronto
87gtNOS 87gtNOS
Default

Quote:
Originally Posted by oneshot View Post
Hey Guys,

Each time my report comes back with the Catalyst and Evap systems as not ready.

Thanks

What is the procedure that gives this result? Do they plug into your ODB2 port? There is talk of that happening here in Ontario, Canada.
__________________
Why is he called '87gtNOS'?!
http://www.youtube.com/watch?v=yPNTkb6z074
87gtNOS is offline   Reply With Quote
Old 08-20-2011, 10:29 PM   #7
dougbfresh
CF Senior Member
 
Member Since: Nov 2005
Default

Are you clearing ANY codes BEFORE you test?
dougbfresh is offline   Reply With Quote
Old 08-21-2011, 01:21 AM   #8
Camjamsdad
CF Senior Member
St. Jude Donor '13
 
Camjamsdad's Avatar
 
Member Since: Oct 2007
Location: It's true money can't buy happiness, but it is more comfortable crying in a Corvette than on a bicycle.
Default

When I lived in Texas they only emission tested in the major metro areas. How about a drive to podunk county that doesn't test? Back in the day you could just buy the sticker and slap it on the windshield yourself but the trick was finding the right shop.
Camjamsdad is offline   Reply With Quote
Old 08-21-2011, 09:59 AM   #9
dougbfresh
CF Senior Member
 
Member Since: Nov 2005
Default

Quote:
Originally Posted by nj02vette View Post
If the catalyst system is showing up as "not ready", then it's probably the rear O2 sensors aren't reporting correctly, or they are reporting correctly and the cats are going.

Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
These are NOT codes, they are I/M monitor tests-they can not be tuned out. If it's like IL-the just plug into the OBD port. I have other OBD readers, I plug in all my vehicles before I go to test-I know 100% that all the I/M monitors pass before I go in.

The I/M monitors test things like Catalyst, EGR (where applicable), Evaporative Emissions,... Some states will allow you to fail 1 I/M test some will not.

Here in IL, the OBD test goes right to the State-no way to get around it.
dougbfresh is offline   Reply With Quote
Old 08-21-2011, 10:53 AM   #10
carhodge
CF Senior Member
 
carhodge's Avatar
 
Member Since: Feb 2010
Location: hodge oklahoma city,ok.
Default

Move to okla no inspection.Just kidding,that sucks.
carhodge is offline   Reply With Quote
Old 08-21-2011, 01:28 PM   #11
oneshot
CF Senior Member
 
oneshot's Avatar
 
Member Since: May 2007
Location: Round Rock TX
Default

Quote:
Originally Posted by dougbfresh View Post
These are NOT codes, they are I/M monitor tests-they can not be tuned out. If it's like IL-the just plug into the OBD port. I have other OBD readers, I plug in all my vehicles before I go to test-I know 100% that all the I/M monitors pass before I go in.

The I/M monitors test things like Catalyst, EGR (where applicable), Evaporative Emissions,... Some states will allow you to fail 1 I/M test some will not.

Here in IL, the OBD test goes right to the State-no way to get around it.
Correct, the inspection places just plug into the OBD port and read the monitors. I am not sure if they will allow it to pass with 1 failed IM test or not.
oneshot is offline   Reply With Quote
Old 08-21-2011, 01:32 PM   #12
oneshot
CF Senior Member
 
oneshot's Avatar
 
Member Since: May 2007
Location: Round Rock TX
Default

Quote:
Originally Posted by nj02vette View Post
If the catalyst system is showing up as "not ready", then it's probably the rear O2 sensors aren't reporting correctly, or they are reporting correctly and the cats are going.

Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
Is there a way I can have the rear O2 sensors tested? Would the OBDII readers being able to test if the rear senors are working or not?
oneshot is offline   Reply With Quote
Old 08-21-2011, 04:10 PM   #13
Aerovette
CF Senior Member
 
Member Since: Nov 2001
Location: From the windowwwwww to wall
Default

If I remember correctly Texas allows 1 fail but cannot pass a "not ready". I had some repairs done and the shop disconnected the battery. It caused me to fail my inspection. I had to drive for about a week with my fingers crossed until I could get the drive cycle completed.
Aerovette is online now   Reply With Quote
Old 08-21-2011, 04:29 PM   #14
sfc rick
CF Senior Member
 
sfc rick's Avatar
 
Member Since: Nov 2009
Location: Huntington tx
Default

OMG!!!! I'm in Angelina County and we don't have that silliness! Tires-Check! Lights working-Check! Wipers-Check! Brakes-Check! $14.50-Check! Here's your Inspection sticker Have a nice day!

Last edited by sfc rick; 08-21-2011 at 04:34 PM.
sfc rick is offline   Reply With Quote
Old 08-22-2011, 12:01 AM   #15
oneshot
CF Senior Member
 
oneshot's Avatar
 
Member Since: May 2007
Location: Round Rock TX
Default

I wish I could take it to a different county however I live just north of Austin (Williamson County) and we are required to have that whole stupid emission test done. If I try to go to a different county they are required to run the same test that Williamson County would run. SO it is pointless to go some where else.

I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.

I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.

Does anyone know what the EVAP system is and what makes it up?
oneshot is offline   Reply With Quote
Old 08-22-2011, 12:13 AM   #16
shadowman1
CF Senior Member
 
shadowman1's Avatar
 
Member Since: Aug 2007
Location: Austin Tx
Default

Quote:
Originally Posted by oneshot View Post
Correct, the inspection places just plug into the OBD port and read the monitors. I am not sure if they will allow it to pass with 1 failed IM test or not.
In Texas you can have 1 moniter " Not Ready " and pass but none can be " Failed ". Any failure will turn on a check engine light.
shadowman1 is offline   Reply With Quote
Old 08-22-2011, 12:15 AM   #17
shadowman1
CF Senior Member
 
shadowman1's Avatar
 
Member Since: Aug 2007
Location: Austin Tx
Default

Quote:
Originally Posted by oneshot View Post
I wish I could take it to a different county however I live just north of Austin (Williamson County) and we are required to have that whole stupid emission test done. If I try to go to a different county they are required to run the same test that Williamson County would run. SO it is pointless to go some where else.

I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.

I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.

Does anyone know what the EVAP system is and what makes it up?
Evap system stores gas vapors in a charcoal canister and at certian times a solenoid opens to burn them thru the engine to help reduce pollution.

If you get down to only 1 " Not Ready" you will pass in Williamson county.
shadowman1 is offline   Reply With Quote
Old 08-22-2011, 11:48 PM   #18
dougbfresh
CF Senior Member
 
Member Since: Nov 2005
Default

Quote:
Originally Posted by oneshot View Post
I wish I could take it to a different county however I live just north of Austin (Williamson County) and we are required to have that whole stupid emission test done. If I try to go to a different county they are required to run the same test that Williamson County would run. SO it is pointless to go some where else.

I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.

I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.

Does anyone know what the EVAP system is and what makes it up?
If your not getting any EVAP codes, the I/M test will eventually run on it's own and pass or fail. You'll see this on your scanner. If it FAILS, it will set a code (i.e. the loose gas cap will set this code).
dougbfresh is offline   Reply With Quote
Old 08-23-2011, 12:11 AM   #19
oneshot
CF Senior Member
 
oneshot's Avatar
 
Member Since: May 2007
Location: Round Rock TX
Default

Quote:
Originally Posted by dougbfresh View Post
If your not getting any EVAP codes, the I/M test will eventually run on it's own and pass or fail. You'll see this on your scanner. If it FAILS, it will set a code (i.e. the loose gas cap will set this code).
I found the line between the Evap solenoid and the TB was not all the in. So I am hoping that fixes the Evap "not ready" but I have to drive around for a while to burn off some gas. What I have read is that the Evap test will not run until the gas tank is less then half full.
oneshot is offline   Reply With Quote
Old 08-23-2011, 12:11 AM   #20
andy46
CF Senior Member
 
andy46's Avatar
 
Member Since: Apr 2011
Default

Quote:
Originally Posted by 87gtNOS View Post
What is the procedure that gives this result? Do they plug into your ODB2 port? There is talk of that happening here in Ontario, Canada.
The testing has been here in BC for years now, newer cars are simple, they just plug into the OBD port, if you have no issues you won't have a problem.
The whole crap is nothing but a money grab, costs $45. here every year!!
andy46 is offline   Reply With Quote
Old 08-23-2011, 12:11 AM
 
Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 General
Reload this Page Failed Inspection test - catalyst not ready
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help after thorough troubleshooting Tripleblack06 C6 Scan & Tune 4 07-23-2014 06:07 AM
My new C6 wont pass ontario emissions :( freaknbigpanda Canadian Events 16 04-22-2014 04:51 PM
Failed inspection: ARH headers, o2 sensor "not ready" Tikiman12 C6 Tech/Performance 17 09-09-2011 03:24 PM
Inspection: FAIL (not ready) Aerovette C5 General 38 09-14-2010 03:07 PM
Chevy dealer couldn't emissions test my car b/c of "NOT READY" readings... help? Cobra4B C5 Tech 13 09-12-2005 05:51 PM


Tags
2002, c5, catalyst, complete, corvette, e5, evap, fails, fbody, gmc, inspection, mon, ready, texas, vette


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 09:37 PM.


Emails & Password Backup