Questions & Answers for: Buick Century control valve

control the valve and one of the valves may be damaged where it can not compensate at idle. If the EGR is working, when the engine first starts the engine should increase in idle speed and then switch

...control valve circuit, what is it talking about The meter is showing evaporative purge control valve circuit, what is it talking about The EVAPORATIVE PURGE CONTROL VALVE is located under the hood ...

...control inlet, you should see the valve lift away from the seat. I use brake cleaner and compressed air to spray clean and blow out the valve just to test it and then go from there depending on what ...

...repair shops and still the same problem.  I am a lady and think that I am getting taken.  I know what the Idle Control Module is, but what valve is it that you are talking about

...control valve, start by making sure the throtle is clean then have the idle air valve checked, when starting the valve should open to raise idle and drop down after it starts, it sounds like your ...

...Control Circuit, what that means and how to repair it. The evap canister has a valve on it check the pigtail on the valve and make sure its plugged in good . there is a fuse for it as well . if the ...

...valve control is Pulse Width Modulated (PWM) or turned ON and OFF several times a second. The duty cycle (pulse width) is determined by engine operating conditions including load, throttle position, ...

...control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the ...

...of the lockup torque converter. If you can give it some extra gas and keep it running, check the idle air control valve. The computer controls idle speed by how much air enters thru the control

...control valve - blockage at the vent hose, vent filter or vent control valve - open or short in the vent control valve circuit - bad charcoal canister - EVAP system leak - faulty EVAP system pressure ...