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So even after the engine is running, they could continue to 'glow' for up to two minutes?
That is correct...the PCM uses temperature, barometric pressure, and oil temperature to determine how long the glow plugs should be on. That is one reason I put an led which lets me know when the GPR is commanded on by the PCM...others have just put a manual switch to turn on/off GPR.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
