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.
Engine Ignition
The electronic ignition (EI) system is a coil-on-plug (COP) ignition system. The COP ignition system consists of the:
- Camshaft position (CMP) sensor.
- Crankshaft position (CKP) sensor.
- Ignition coils.
- Spark plugs.
The CMP sensor:
- Sends the powertrain control module (PCM) a signal indicating camshaft position used for fuel and spark synchronization.
The CKP sensor:
- Is a variable reluctance sensor.
- Is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft.
- Provides base timing and crankshaft speed (rpm) to the PCM.
The 8 separate ignition coils:
- Change low voltage to high voltage pulses, based on signals from the PCM.
- Produce the high voltage pulses to the spark plugs.
- Are connected directly to each spark plug.
The spark plugs:
- Change high voltage pulses into a spark which ignites the fuel and air mixture.
- Originally equipped on the vehicle have a platinum-enhanced active electrode for long life.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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