Hard Start (Engine Hot)
- Check for excessive fuel pressure. Clean and repair fuel return line and/or fuel pressure regulator.
- Check for contaminated fuel pressure regulator valve and seat. Clean and repair fuel pressure regulator as required. Check fuel pressure bleed down after engine is turned off.
- Check for leaking or inoperative fuel injector. Check fuel injector operation. Check for leaking injector "O" ring seal. Perform injector leakage test.