|
|
6E – 4 EXHAUST GAS RECIRCULATION (EGR) SYSTEM Exhaust Gas Recirculation (EGR) System Check Step Action Value (s) Yes No 1 Check the EGR valve for looseness. - Go to Step 2 Go to Step 3 2 Tighten the EGR valve. - Verify repair - 3 1. Engine "OFF." between the EGR valve and ignition feed. Does the test light illuminate? - Go to Step 5 Go to Step 4 4 Repair the EGR harness ignition feed. - Verify repair Go to Step 5 5 1. Remove the EGR valve. valve passages and adapter for excessive deposits, Does the EGR valve have excessive deposits, - Go to Step 6 Go to Step 7 6 Clean or replace EGR system components as necessary. - Verify repair Go to Step 7 7 1. Remove the EGR inlet and outlet pipes from the intake and exhaust manifolds. 2. Visually and physically inspect manifold EGR ports and EGR inlet and outlet pipes for blockage or restriction Do the manifold EGR ports or inlet and outlet pipes have - Go to Step 8 EGR system working properly. No problem found. 8 Clean or replace EGR system components as necessary. - Verify repair - |