Release the Cancel button once the LED lights come on. This resets both the printer and the NVRAM together. Press and hold the Reset button near the back of a 5P or 6P printer as you turn on the power. Holding it for less than 20 seconds resets the printer only.
Once the throttle body is exposed, spray the throttle-body cleaner inside the air duct, and use the brushes to gently dislodge the dirt, gum and varnish that are present. Note: Be very careful not to let the thin, plastic spray nozzle (or anything else!) fall into the throttle-body opening.
The throttle body regulates the air flow that goes into the engine. It is used in conjunction with a fuel injection system. A cable connects the accelerator to the throttle. When the accelerator is pressed, the throttle opens, allowing for more air into the intake system. The throttle body spacer permits more air than usual to go into the engine.