Engine Will Not Start or Difficult Starting

DEFINITION
Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies and must be re-started.

CHECK:

- For water contaminated fuel.
- Fuel system pressure.
- TPS for sticking or binding.
- EGR operation. Valve should be fully seated closed with engine "OFF".
- For a faulty in-tank fuel pump check valve which would allow the fuel in the lines to drain back to the tank after the engine is stopped.
1. Ignition "OFF."
2. Disconnect fuel line at the filter.
3. Remove the tank filler cap.
4. Connect a radiator test pump to the line and apply 103 kPa (15 psi) pressure. If the pressure will hold for 60 seconds, the check valve is OK.

Check ignition system for:
- Proper sparking voltage and duration.
- Worn distributor shaft.
- Bare and shorted wires.
- Improper pickup coil resistance or poor connections.
- Loose ignition coil connections.
- Moisture in distributor cap.
- Spark plugs for wetting, cracks, wear, improper gap, burned electrodes, or heavy deposits.