Hard Starting

SYMPTOM DESCRIPTION:

Engine cranks OK, but does not start immediately. Will eventually start and run, but may die shortly after.



SYSTEM OR COMPONENT TO CHECK ACTION

COMPUTER INPUTS/OUTPUTS
CHECK: ^ ENGINE SPEED/REFERENCE SENSOR: Damaged
or defective engine speed/reference
sensor or wheel.
^ ELECTRONIC CONTROL UNIT: Defective
electronic control unit.
^ IDLE VALVE: Stuck or partially
closed idle valve.


CHECK: ^ FUEL PUMP RELAY:
FUEL NOTE: ^ Fuel pump relay operation.
Pump should continue to run after the engine has
started.
^ WATER CONTAMINATED FUEL:
^ FAULTY FUEL PUMP CHECK VALVE:
This could allow the fuel in the lines to drain
back to the tank after the engine is stopped.
^ FAULTY FUEL PRESSURE REGULATOR:







IGNITION CHECK: ^ Proper ignition output voltage . ^ Spark plugs, wet plugs, cracks, wear,
improper gap, burned electrodes or
heavy deposits.
^ Bare and shorted wires.
^ Moisture in distributor cap.