Quote:
Originally Posted by MetroMPG
Use of a block / coolant heater would help some in a vehicle that does short trips, even in warm ambient temperatures. Of course that only helps with coolant temp. Efficiency is still going to suffer from other cold drivetrain components like the transmission, tires, etc.
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Interesting idea.
When I start my engine it idles at 1200 rpm until the coolant reaches 140°F (60°C) after which the revs drop to 850 rpm. At the same time the fuel flow rate drops from 40cc/min to 20cc/min.
Why is this? It seems like an unnecessary waste of fuel considering the ambient temperature is around 72°F (22°C).
Is there anyway to disable this or is it automatically controlled by the vehicle's ECU?