I’ve heard people say that fuel injection automatically turns off when you let the car coast in gear, but if I completely let off the accelerator in first gear, the car will only slow down to 3-5mph (depending on the car) and will then stay at that speed indefinitely like a lil’ cruise control, suggesting that the car was always injecting fuel at engine idle ratio?
I understand this kind of question has been asked before, but as this element doesn’t check out, I don’t believe it has actually been completely answered.
In: Engineering
The engine still needs fuel to continue idling (to stay ‘on’) so the computer injects enough to keep it running. If you’re not in neutral i.e engine and drivetrain ‘connected’, this amount of engine output at that rpm will still be enough to generate some turning force through the drivetrain to the wheels. Low gear and low rpm -> low speed.
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