Illinois drivers - emissions - rejected system "not ready"
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
Illinois drivers - emissions - rejected system "not ready"
Anybody ever have this happen? I just put in a 160 stat and lowered the fan speeds (didn't tell them that). Tester says care may not have gotten "hot" enough to complete test.
Will raising the fans up higher just for the test solve the problem? I have HP tuners and only have turned off the EGR function (couple of years ago) and passed emissions before.
Will raising the fans up higher just for the test solve the problem? I have HP tuners and only have turned off the EGR function (couple of years ago) and passed emissions before.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
You need to drive the entire GM Driving Cycle to ensure any "Not Readys" you've generated with the mods will be reset. I've had to do this myself before to be able to pass emissions in Indiana.
To perform an OBDII Driving cycle do the following:
Reprinted on OBDII web site courtesy of General Motors Corporation
© General Motors Corporation
General Motors Driving Cycle
A complete driving cycle should perform diagnostics on all systems. A complete driving cycle can be done in under fifteen minutes.To perform an OBDII Driving cycle do the following:
- Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
- Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.
- Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
- Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
- Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
- Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.
Reprinted on OBDII web site courtesy of General Motors Corporation
© General Motors Corporation
Drifting
Joined: Apr 2011
Posts: 1,454
Likes: 6
From: Pittsburgh PA
This happens all the time with salvage cars I rebuild. Something about the computer and being dormant for long periods. Usually just driving it around a bit (like the GM instructions posted) makes everything happy again.
BTW, thanks to Patches for posting that. I have a Grand Prix I've been driving around without an emission sticker cause it isn't ready. Inspection guy just says "keep driving it...it may take a while"
BTW, thanks to Patches for posting that. I have a Grand Prix I've been driving around without an emission sticker cause it isn't ready. Inspection guy just says "keep driving it...it may take a while"
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
You need to drive the entire GM Driving Cycle to ensure any "Not Readys" you've generated with the mods will be reset. I've had to do this myself before to be able to pass emissions in Indiana.
To perform an OBDII Driving cycle do the following:
Reprinted on OBDII web site courtesy of General Motors Corporation
© General Motors Corporation
General Motors Driving Cycle
A complete driving cycle should perform diagnostics on all systems. A complete driving cycle can be done in under fifteen minutes.To perform an OBDII Driving cycle do the following:
- Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
- Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.
- Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
- Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
- Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
- Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.
Reprinted on OBDII web site courtesy of General Motors Corporation
© General Motors Corporation
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Check the rules as well - some states allow one and some two "Not Readys" and you can still pass. I have driven only part of the cycle to get all but one or two of them off and still passed in Indiana (when they still had an emmissions test).
Best of luck!
Best of luck!
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
That's what I'm wondering too... If he did then ALL your codes will go to NOT READY.
You need to run the driving cycle as mentioned above
http://www.obdii.com/drivecycle.html
Toque
You need to run the driving cycle as mentioned above
http://www.obdii.com/drivecycle.html
Toque
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Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
That will most definitely do it. In fact, the last time I had to drive the cycle was because I had flashed a new tune into my PCM with EFILive right before it was due for emissions testing.