Help!!!!Having Problem Passing Emissions!!!!

[RAYSRT8]

I have had my SS for a year now and I was supposed to get my tags renewed at the end of April, but I can't pass emissions due to all the readiness monitors are not in the "Ready" state. I have a Cam, LT Kook's headers, High Flow Cats, Edelbrock E-Force, CAI, Jannetty Custom Tune, Twin Fuel Pumps and the rest of the upgrades are in my signature. Long story short at one time I had a CEL on due to a slight kink in the EVAP hose so I ordered a aftermarket one from TECHAFX and is is a whole lot better quality than the factory one of the one that comes with the E-Force set-up. I installed the hose and reset the CEL and drove the vehicle approximately 200 miles and the readiness monitors are still not reseting. Here is what I get when I check the system and in that order.
Misfire Monitor – Ready
Fuel System – Ready
Comprehen Comp – Ready
Catalyst – ready
EVAP System – Not Ready
Oxygen Sensor – Not Ready
HTD 02 Sensor – Ready
I notifed Ted and he sent me another tune and I have installed it and drove another 70 or so miles and now I am showing this
Misfire Monitor – Ready
Fuel System – Ready
Comprehen Comp – Ready
Catalyst – Not Ready
EVAP System – Not Ready
Oxygen Sensor – Not Ready
HTD 02 Sensor – Ready

The car runs fantastic, but I can't get it to read everything to pass emissions...

Any help out there would be appreciated!!!!!!

Thx,

Ray

[Eric Baker]

You need to drive it in a mixture of situations, i.e. traffic/highway/various speeds, and also will need to turn the car off and restart it again a few times. There are certain procedures to get the monitors to run in a quick manner, though I'm not sure what they are in a GM. After I had my tune, I tried getting a sticker after about 65 miles and didn't pass. I went back a while later and all was good.

[RAYSRT8]

Originally Posted by Eric Baker

You need to drive it in a mixture of situations, i.e. traffic/highway/various speeds, and also will need to turn the car off and restart it again a few times. There are certain procedures to get the monitors to run in a quick manner, though I'm not sure what they are in a GM. After I had my tune, I tried getting a sticker after about 65 miles and didn't pass. I went back a while later and all was good.

Thanks... Do you have LT, FI, etc. as well?

[bob vogel]

Originally Posted by Eric Baker

You need to drive it in a mixture of situations, i.e. traffic/highway/various speeds, and also will need to turn the car off and restart it again a few times. There are certain procedures to get the monitors to run in a quick manner, though I'm not sure what they are in a GM. After I had my tune, I tried getting a sticker after about 65 miles and didn't pass. I went back a while later and all was good.

this sound's right to me . i THINK the car has to cycle many times then you'll be ok.

[RAYSRT8]

Originally Posted by bob vogel

this sound's right to me . i THINK the car has to cycle many times then you'll be ok.

Do you guy's have LT and other mods as well?

[RAYSRT8]

Bump for the morning crowd..

[NickJRE]

Yea you are going to have to keep cycling it and getting more miles on it. There is no magic number really, but I've seen it take a couple hundred miles for them to set in some cases.

[RAYSRT8]

Originally Posted by NickJRE

Yea you are going to have to keep cycling it and getting more miles on it. There is no magic number really, but I've seen it take a couple hundred miles for them to set in some cases.

I have put over 400 miles on it the first time, 180 the second time and now 100+ the third time.. I have to find a way to get this done as I am driving on expired tags.

Thx

[RAYSRT8]

I found some info yesterday that I sent to Ted to see if he thinks it would help since I do not have the factory tune and hopefully I will hear something back today... If anyone else wants to chime in then please do

Thx

General Motors Driving Cycle

• 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.

[RAYSRT8]

No one else had had this issue?

[Eric Baker]

No F.I. but I do have a cam and long tube headers with high flow cats.

[RAYSRT8]

Originally Posted by Eric Baker

No F.I. but I do have a cam and long tube headers with high flow cats.

Thanks!!! Was yours done with just a tune or did you have to use anti-foulers to get the job done? Also did it take over 100 miles to get your ready monitors to reset?

[RAYSRT8]

Ted has sent me a 3rd tune today to try and make this work for emissions and if this this not work I will just shi*......I am really nervous driving on expired tags and here in TN all readiness monitors have to be functional to pass the inspection. Ted did mention that if I get a CEL I may have to use anti-foul plugs on the rear 02's to make this work..

If anyone else has any suggestions at all please chime in....


Thanks,

Ray

[Aries240SS]

Best bet is to put the miles on the car after the new tune. The O2 sensors and catalyst reading not ready means you have not spent sustained driving time at 55-65mph under light load. Normally this happens when you accelerate over 50% throttle when getting up to that speed (freeway on ramp) and the condition does not set for the test to be run.

For example, my LT1 car takes between 10 and 50 miles of driving to clear all not ready errors after a tuning session. It's all about getting the conditions right for the PCM to enter its monitor test available status.