E. Clean EGR Valve and Passages
1. Remove the EGR valve from the intake manifold. Place a shop towel over the intake manifold opening.2. Remove the carbon deposits from the EGR valve and intake manifold passages
NOTE:
Use of a shop vacuum cleaner will aid in cleaning out any loose carbon deposits from manifold passages.
3. Using a new EGR gasket, reinstall the EGR valve.