A check of the exhaust gas by Gil MK for CO and HC may reveal some malfunctions of the vehicle. The concentrations of the substances shall be in accordance with the GB18352.3-2005 standard. If it does not match the normative values, the possible causes are as follows: High HC concentration and normal concentration of CO is a malfunction of the ignition system, an incorrect clearance in the valves, a cylinder block being pressurized. A high HC concentration and low CO concentration with PCV pipe, idle, no sparks. High HC concentration and high CO concentration has an air filter or PCV valve, a EFI system malfunction, engine control unit, engine control unit, coolant sensors, The throttle or pressure/temperature of the intake air, the injector.
- High HC concentration and normal CO concentration is a malfunction of the ignition system, incorrect valve opening, depressurization to the cylinder block.
- High HC concentration and low CO concentration with PCV pipe manifold, idle valve, absence of sparks.
- High HC concentration and high CO concentration is the air filter, or PCV valve, failure of the EFI system, engine control unit, cooling fluid sensors, throttle control, or intake air pressure/temperature, injector.