Engine Starts/Won't Run, Hard or No Start

CONDITION
^ Engine starts but will not run - Engine hard to start or will not start.

POSSIBLE SOURCE
^ EGR valve malfunction.
- Perform EGR valve functional diagnosis.

^ EGR flange gasket leaking.
- Replace flange gasket and tighten valve attaching nuts or bolts to specification.

^ EGR valve attaching nuts or bolts loose or missing.
- Replace flange gasket and tighten valve attaching nuts or bolts to specification.

^ EVR solenoid malfunction.
- Run quick test.

^ EGR valve contamination.
- Clean EGR valve and if necessary, replace EGR valve.