Difficult To Start

NOTE: If engine cranks but will not start, see BASIC TESTING article for trouble shooting procedure.

Check for contaminated fuel.
Check fuel pressure.
Check for faulty ECT sensor and circuit.
Check for faulty IAT sensor and compare readings with ECT sensor.
Check for loss of crank signal to PCM.
Check EGR system.
Check fuel pump relay and circuit.
Check ignition system and grounds.
Check for faulty IAC operation (if equipped).
Check for faulty main (or PCM) relay.
Check for faulty TP sensor.
Check for faulty PCV system.
Check for faulty CP sensor
Check for faulty fuel pump relay
Check for improper or worn camshaft.
Check engine compression.
Check for leaking cylinder head gasket
Check fuel injectors drain down time and circuit
Check for intake and exhaust manifold leaks.
Check for contaminated fuel.
Check for faulty A/T gear position circuit
Check for faulty PGM-FI main relay (Oasis).