Questions & Answers for: GMC high emissions

What is the cause of High emissions of Nitrous Oxide on 99 GMC Jimmy What is the cause of High emissions of Nitrous Oxide on 99 GMC Jimmy new catalytic converter and oxygen sensors

...emissions test, co was to high. tune was just done. Could I just service the fuel injection system to fix the problem, or replace the evap canister? theres 3 things ur emisans fail on 1 spark plugs 2 ...

...Emission System Pressure Sensor/Switch Low P0453 Evaporative Emission System Pressure Sensor/Switch High P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent P0455 Evaporative ...

...high idle emissions. Emission numbers were 10-20x max legal limit (over 3000). Replaced the catalytic converter and EGR valve and cleaned the idle air valve and took back to emissions. Truck passed ...

...emissions with every part changed for fuel systems? Changed all fuel systems except catalitic convertor and canister and computer? or rest? Your converter won't be doing much after 17 years, if it is ...

...high HC's as well since fuel gets into the oil and make sure your PCV valve is operating correctly. If you can't get it adjusted correctly, you may have to pay a shop to hook it up to the emissions ...

...Emissions and Safety Inspection except it failed the pollutant HC(ppm) Emission Test at High Speed the given standard is 143 and the current reading topped out at 196 but only at the Higher speed ...

for  emission test to see whether you do have high emission due to lambda sensor failure or cat. also you can check from your exhaust end if your emissions smell like rotten eggs.If so change cat

...runs good and burns little gas real gas saver but the hc carbon output on the emission test was way high 4000 needs to be below 160 to pass. It ain't the timing all that was check. If egr ...

...emissions systems are ? DTC P0449 Evaporative Emission (EVAP) vent Solenoid Control Circuit A battery positive voltage is supplied to the evaporative emission (EVAP) canister vent solenoid valve. The ...