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What causes a car to lose power then continue running fine after turning off the ignition switch?In: American Cars [Recategorize] |
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Answer
It depends on the car. Older vehicles, with carburators and mechanical fuel pumps can continue to run after the engnine is turned off. It's a condition called "Piston Glow" or "run-on". If it's a newer vehicle, the fuel pump and injectors shut off immediately when you turn off the key so it's not possible to continute running unless there is a problem with the switch.
Timing set too far advanced and very low octane fuel may also cause dieseling (run- on). Before fuel injection this was common and some carburators had an electrical shut-off valve to stop the run-on.
First answer by Redbeard. Last edit by Jwplocks. Contributor trust: 55 [recommend contributor]. Question popularity: 52 [recommend question]
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