Emissions Failure - "Not Ready"
Thread Starter
Racer
Joined: Sep 2003
Posts: 317
Likes: 5
From: St. Louis Missouri
Emissions Failure - "Not Ready"
I purchased a C5 coupe that has LG headers and Randon Tech cats on it. It was rejected for emissions testing because the "catalyst" and "evaporative system" were not ready. I searched prior thread and it appears I need to do the GM drive cycles to reset the ECM parameters. Here's my question. Do the items listed in the drive cycle have to be done in immediate order? I live 20 minutes from any highway that I can run at 55mph for 3-5 minutes without stopping. So can I do the cold start in the garage, drive it to the highway and then start the long runs?
Is there a way of ensuring the Catalyst is "ready" prior to taking it back for re-inspection??
I hate emissions testing!!
Is there a way of ensuring the Catalyst is "ready" prior to taking it back for re-inspection??
I hate emissions testing!!
Team Owner
Joined: Feb 2003
Posts: 37,329
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From: Plano Texas
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Need to drive more than 50 miles to reset. Order is not important.
As a note - if someone 'cut' these out of the computer (for reasons unknown) you will not get a reset, and fail again.
There isn't a in- car means to 'see' if all is ready prior to testing.
As a note - if someone 'cut' these out of the computer (for reasons unknown) you will not get a reset, and fail again.
There isn't a in- car means to 'see' if all is ready prior to testing.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Just do it in the sequence you can best approximate it in. Fact is, if the battery was disconnected recently and if you drive the car enough, it will eventually reset all the settings where they are ready as long as everything is installed and working properly. The PCM needs a certain number of start/driving cycles to reset all the emissions devices. I went through this last year after loading a new tune into my PCM when I had a problem. I did one GM OBDII driving cycle on the way to the test station to get it to pass with one not ready. I use EFI Live tuning/scanning software to test the emissions myself prior to going in to make sure I'll pass.
With LG's you'll probably have the rear O2's disabled or with sims so they'll most likely register as not ready. However, most states doing emissions testing allow one or two not readys and will still pass you.
With LG's you'll probably have the rear O2's disabled or with sims so they'll most likely register as not ready. However, most states doing emissions testing allow one or two not readys and will still pass you.
Thread Starter
Racer
Joined: Sep 2003
Posts: 317
Likes: 5
From: St. Louis Missouri
Does anyone have the rear 02 simms installed and passed the emissions test?
Are there scanning tools (besides the software package) that can determine the "readiness" of the catalysts? Thanks for the help.
Are there scanning tools (besides the software package) that can determine the "readiness" of the catalysts? Thanks for the help.
