Just curious, what's the difference in peak and hold, and saturated injectors? As for as how they work.

Are they both controlled with pulse width?

They work the same way. Peak and hold type require less current to respond and use a special peak and hold driver or a current limiting resistor to keep them from overheating. Peak and hold injectors typically respond faster when using peak and hold drivers than saturated injectors Saturated injectors will work with either type of driver. Peak and hold injectors must have a peak and hold driver or a current limiting resistor (or an external driver box).

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