The EGR valve (aka solenoid) is at the right rear corner of engine, near the distributor. The MAP sensor is in the engine compartment, just above the wiper motor. Follow the steps below to clean them.
Unplug the vacuum hose or electrical connector from the top of the valve, depending on your particular model.
Unscrew and remove the two mounting valve-to-engine bolts using a wrench or ratchet and socket.
Disconnect the pipe from the bottom of the EGR valve using a wrench or adjustable wrench, being careful not to damage the connecting nut.
Lift the valve away from the engine compartment and remove the gasket.
Detach the EGR solenoid from the top of the valve, if your particular model comes equipped with one. Remove the four screws using a Phillips screwdriver.
Remove carbon deposits from the bottom passage on the valve using a scratch awl.
Remove carbon deposits from the pipe and engine valve passages using the scratch awl.
Remove any gasket material from the bottom of the valve and engine-mounting base using a plastic scraper to avoid damage to the mating surfaces.
MAP Sensor Cleaning
Remove the electrical plug running to the MAP sensor. Squeeze the release tab on the top of the plug and pull the connector off.
Remove the screws holding the MAP sensor in place and remove the sensor.
Turn the sensor upside down on a flat surface so that the sensor end of the MAP sensor is exposed.
Spray the sensor liberally with electronic parts cleaner. Remove any visible signs of dust or other contaminates. The electronic parts cleaner will evaporate, so there is no need to wipe it down.
Re-install the MAP sensor.
Thursday, April 29th, 2010 AT 2:13 PM