emissions

  1. B

    3rd gen check engine light for vapor system in 2008 1500

    trying to find out if anyone has had any experience with this problem before. 2008 dodge ram 1500 2 wheel drive 3.7 L. 72k in original mileage. check engine light had come on with 3 codes all regarding the vapor system. Over the last few months i've replaced the purge solenoid , the vapor...
  2. S

    Emissions monitors disabling on startup

    As title states, I have a 2006 Ram 1500 Hemi. The specific monitors that are disabling after cranking, but enabled during KOEO (Key On Engine Off) are the Misfire and Fuel System monitors. I've done some preliminary research and testing but overall have no idea what is causing this and dont want...
  3. I

    Emissions test requirement in Illinois for diesel?

    I live in Suburban Chicago (Crook County) and I found a 2014 Ram 1500 with the 3.0 diesel engine. The DEF system was removed. Is there an emissions test requirement for diesel vehicles? I ran a check with my OBD scanner (BlueDriver) and no fault codes popped up.
  4. The Tow Rat

    Cummins 12V vs 24V... what do people think?

    Is it true that the purpose of the 24V is entirely to reduce emissions? Traditionally four valve cylinder heads are used to achieve: 1) Lower reciprocating valvetrain mass per cam lobe. 2) Straight-shot port geometry. 3) Tumble turbulence during the intake stroke. Until recently I'd never...
  5. K

    P0420 code problem

    I've got an 07 1500 5.7 QC 4x4. She's got roughly 181k miles on her. For about a year now I've had an intermittent cel for P0420. I've done a spark plug change, ran system cleaner, reset ecm, used an infrared thermometer and live data feed to try to diagnose it. Both infared and the LD...

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