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Thread: Need Tune to Pass Smog Testing in Colorado

  1. #1
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Default Need Tune to Pass Smog Testing in Colorado

    Hi everyone ~ This is Kristen, Shawn's wife. I am hoping that someone can help me with a tune to pass emissions in Colorado. Tags expire in May; need to get the Camaro to pass emissions so I can re-title and register the car in my name.

    If you are familiar with Colorado emissions testing, they put the car on the rollers, put sniffers up to the tail pipes, and hook up to the OBDII connector. They test the car at various speeds, trying to imitate "normal" driving conditions. If I had to guess, they only take it up to 4th gear - it didn't sound like they shifted to 5th at all. (JoeCar suggested I ask them to shift telling them that I normally drive in fifth or sixth - I will do this next time). I've run the car through twice; failed on Hydrocarbons both times; everything else passed.

    Shawn has some details on the car setup in his signature (hopefully will show up at the bottom of this post) ... It sure is a lot of fun to drive!

    I'm attaching several documents to the post. Both emissions testing results - including trace graphs of the various emissions related criteria v. speed and time. I am also attaching a copy of the current tune. The only difference between the two tests is that I changed the PE modifier in table B3618 from 12.17434 to 14.59447 for all RPM's up thru 6000 for the second test. Hydrocarbons actually increased on that run.

    I can run some logs, if necessary, and post them. I'll try to answer any questions I can; I helped Shawn a lot with the tuning initially, then he really took off with it and his knowledge far exceeded mine. I have limited records on the modifications that have been made to the car, but I'll do my best. Any help that anyone can offer would be greatly appreciated!
    Attached Files Attached Files
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  2. #2
    Joe (Moderator) joecar's Avatar
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    Hi Kristen

    post some log files when you can (showing LONGFT1/2 and HO2S11/21 ).


  3. #3
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Ran around a bit this afternoon. Tried to get a variety of driving conditions, neighborhood, local roads, highway, etc. Noticed a bit of KR (.8 degrees) on highway entrance ramp - I think I was in 4th gear, accelerating - hard to watch the computer and drive at the same time.

    Please let me know if more is needed, etc.

    Thanks!
    Kristen
    Attached Files Attached Files
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  4. #4
    Lifetime Member GMPX's Avatar
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    Hey Kristen, how is everything going with the family now?
    I no longer monitor the forum, please either post your question or create a support ticket.

  5. #5
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Thanks for asking. We're doing pretty well. Some days are easier than others. I think we have found a groove that works, so going with that. It's given me the opportunity to try to get the car to pass emissions ... Carra hung out in the back seat during the logging run this afternoon ... so we'll see how that goes and how long it lasts.

    Kristen
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  6. #6
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    hi, this is mike with RWR MOTORSPORTS, i've been following the weathermans post for some time and he has helped many people on here, if you're interested, we would be more than willing to help out with dyno time and some tuning to get it to pass the IM240 test, no charge for tuning or dyno time, our shop is just south of chatfield reservoir in littleton
    2002 SS, PROCHARGER AND SOME OTHER GOODIES

  7. #7
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Mike, are you serious? That would be wonderful! Wow! Thank you! I don't know what to say. I am assuming you know what Colorado looks for, then, being local and all. Do you have any ideas for what we can do, tune-wise?

    Can you PM me your contact info? I would appreciate any help you can give!

    Kristen
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  8. #8
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    yes i am serious, shawn helped many people on this forum and asked for nothing in return i feel it is the least i could do, i have 19 years GM dealer experience and 7 years with EFIlive and i know exactly what the IM240 test is looking for, shop phone 303 359 5029, my cell phone 303 475 2337
    2002 SS, PROCHARGER AND SOME OTHER GOODIES

  9. #9
    Joe (Moderator) joecar's Avatar
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    Mike (cme265) of RWR MOTORSPORTS,
    that's very generous, thanks for your help

  10. #10
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    no problem, glad i could help, watching the Daytona 500, holy crap!!!
    2002 SS, PROCHARGER AND SOME OTHER GOODIES

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