Engine Ignition
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The electronic ignition (EI) system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of the:
- eight ignition coil-on-plugs.
- eight spark plugs.
- crankshaft position (CKP) sensor.
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. Refer to ELECTRONIC ENGINE CONTROLS - GASOLINE ENGINES article.
The 8 separate ignition coil-on-plugs:
- change low voltage to high voltage pulses based on PCM signals.
- produce the high voltage pulses to the spark plugs.
- are connected directly to each spark plug.
The 8 spark plugs:
- change a high voltage pulse into a spark, which ignites the fuel and air mixture.