In an evaporative fuel system which valve(s) is (are) normally closed ?

All of thefollowing can increase the pressure in the evaporative emission control system except _______?

Evaporative emission control systems operate on low pressure measured in inches of water (in. H2O) 28 in. H20 is equal to how many psi

An enhance evaporative system is able to detect leaks of which size in the system ?

Which evap valve is subject to rust ans corrosion more than all of the others ?

Before an evaporative emission monitor wil run, the fuel level must be where ?

Technician A says that low pressure smoke installed in the fuel system can be used to check for leaks. Technician B says the nitrogen under low pressure can be installed in the fuel system to check for leaks. Which technician is correct ?

The EGR valve is used to control which exhaust emission ?

OBD II regulations require that the EGR system be tested. Technician A says that the PCM can monitor the commanded position of the EGR valve to determine if it is functioning correctly. Technician B says that the PCM can open the EGR valve and monitor for a change in the MAP sensor or oxygen sensor reading to detect if the system is fonctioning correctly. Which technician is correct ?

Two technician are discussing clogged EGR passages. Technician A says clogged EGR passages can cause excessive NOx exhaust emission. Technician B says that clogged EGR passages cancause the engine to ping (spark knock or detonation). Which technician is correct ?

An EGR valve is partially stuck open, would most likely cause what condition ?

A P0401 DTC (exhaust gas recirculation flow insufficient) is being discussed. Technician A says that a defective EGR valve could be at cause. Technician B says that clogged EGR passages could be the cause. Which technician is correct ?

The PCV system controls which exhaust emission(s) ?

Technician A says that if a PCV valve ratles, then its okay and does not need to be replace. Technician B says that if a PCV valve does not ratle, it should be replaced. Which technician is correct ?

A blocked or PCV system may cause which of the following to occur ?

Fuel injectors can be tested using ___________.

Most port fuel injected engines operate on how much fuel pressure ?

The vacuum hose from the fuel-pressure regulator was removed from the regulator and gasoline dripped out of the hose. Technician A says that isnormal and that everything is OK. Technician B says that one or more of the injectors may be defective, causing the fuel to get into the hose. Which technician is correct ?

The fuel pressure drops rapidly when the engine is turned off. Technician A says that one or more injectors could be leaking. Technician B says that a defective check valve in the fuel pump could be the cause. Which technician is correct ?

What components pulses the fuel injector on most vehicle ?

If the throttle plate needs to be cleaned, what symptoms wil be present regarding the operation of the engine ?

The fuel pump inside the fuel tank on a vehicle equipped with gasoline direct injection produces about what fuel pressure ?

The high pressure fuel pump used in gasoline direct injection (GDI) systems arepowered by __________.

A lack of power from an engine equipped with gasoline direct injection could be due to ______________.