Hard Starting

Definition: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.

^ Perform careful check as described at "Before Starting" in Symptom Diagnosis.

^ Make sure driver is using correct starting procedure.

^ Check for water contaminated fuel.

^ Check fuel pressure CHART A-7.

^ If problem exists in cold weather, check cold start injector, on engines equipped with one. See CHART A-9. Chart A-9 Cold Start Valve Test

^ Check Throttle Position Sensor (TPS) for sticking or binding.

^ Check for high resistance in coolant sensor circuit or sensor itself. See CODE 15 CHART. DTC 15

^ A faulty in-tank fuel pump check valve will allow the fuel in the lines to drain back to the tank after the engine is stopped. To check for this condition:
^ Perform Fuel System Diagnosis, CHART A-7.
^ Check EGR operation. CHART C-7 or C-7A. Chart C-7 Exhaust Gas Recirculation (EGR) Check
^ Check ignition system - Check distributor for:
- Proper Output with ST-125.
- Worn shaft.
- Bare and shorted wires.
- Pickup coil resistance and connections.
- Loose ignition coil ground.
- Moisture in distributor cap.

^ Remove spark plugs. Check for wet plugs, cracks, wear, improper gap, burned electrodes, or heavy deposits. Repair or replace as necessary.

^ If engine then but immediately stalls open distributor by-pass line. If engine then starts and runs OK, replace pickup coil.