Questions & Answers for: Chevrolet high emissions

...emissions 4.3 engine has had a new oxygen sensor spark plugs.throttle body sprayed.failed with high co and hc readings both high.any ideas? Have your cat. converter checked out. I just had one of ...

...could be the throttle position sensor is this correct Exhaust Gas Recirculation Control Circuit High /////////check the vacum

...emissions then the ignition timing should be set at 8 degrees before top dead center. and 10 degrees before top dead center for high altitude vehicles. The #1 cylinder is located at the front spark ...

...emissions were high, how do i fix that? first off you have to tell us what the emission readings of the gases were to help you out.otherwise icould tell you anything and it won`t help to fix the ...

emissions and codes for : evap emission control sys vent control circuit came up- showes code for evap emission control sys pressure sensor low input showes code for evap emission control sys pressure

evaporative emission system high purge flow wont pass emissions change fuel cap

95 chevy astro van won't pass high emissions nox at low speed If its higher mileage check the EGR valve. Famous for being clogged on those engines. Assuming it has emission friendly exhaust.

high level emission output did not pass smog high emission output Your not providing any Emission Gas Numbers High Level of WHAT? You got 5 Gases,what's high & what are the limits you have to stay

emissions control sensor pressure switch located? where is the location of the emission control system pressure sensor high input? The fuel tank pressure switch is on top of the fuel pump and the fuel

...high emissions. Dirty air filter, vacuum leaks, timing set wrong, wrong rpm, bad o2 sensor, defective egr, back cat. converter,sensors out of range ect. ect. It's highly unlikely anyone can guess and ...