Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004EXPLORER 2WD V6-4.0L VIN EREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDESCRIPTION AND OPERATIONENGINE IGNITION
2004 Ford Explorer 2WD V6-4.0L VIN E
Engine Ignition
2004 Ford Explorer 2WD V6-4.0L VIN ESECTION Engine Ignition
ENGINE IGNITION
The ignition system consists of the following:
- crankshaft position (CKP) sensor
- ignition coil
- spark plug wire
- spark plug
The ignition system is:
- an electronic distributorless ignition system (EDIS) is controlled by an electronic engine control integrated into the powertrain control module (PCM).
- set at 10 degrees before top dead center (BTDC) for base timing, and is not adjustable.
The crankshaft position (CKP) sensor:
- is a variable reluctance sensor.
- senses a missing tooth on the crankshaft damper pulse ring.
- generates a crankshaft position signal which is sent to the PCM. The PCM counts this signal for engine rpm.
The ignition coil:
- changes low voltage pulses from the PCM to high voltage pulses.
- has three transformers.
- fires two spark plugs simultaneously.
Spark plug wires carry high voltage pulses from the ignition coil to the spark plugs.
The spark plugs:
- change high voltage pulses to spark at the gap, which ignites the fuel and air mixture.
The firing order is: 1-4-2-5-3-6.
The ignition system consists of the following:
- crankshaft position (CKP) sensor
- ignition coil
- spark plug wire
- spark plug
The ignition system is:
- an electronic distributorless ignition system (EDIS) is controlled by an electronic engine control integrated into the powertrain control module (PCM).
- set at 10 degrees before top dead center (BTDC) for base timing, and is not adjustable.
The crankshaft position (CKP) sensor:
- is a variable reluctance sensor.
- senses a missing tooth on the crankshaft damper pulse ring.
- generates a crankshaft position signal which is sent to the PCM. The PCM counts this signal for engine rpm.
The ignition coil:
- changes low voltage pulses from the PCM to high voltage pulses.
- has three transformers.
- fires two spark plugs simultaneously.
Spark plug wires carry high voltage pulses from the ignition coil to the spark plugs.
Coil Terminal-To-Cylinder Relationship:
The spark plugs:
- change high voltage pulses to spark at the gap, which ignites the fuel and air mixture.
The firing order is: 1-4-2-5-3-6.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.