Why would a fuel pump keep running?
A fuel pump that stays on when the ignition is turned off can be caused by a few things. If you do not believe that the behavior is normal, then it may be possible that the the ignition switch or fuel pump relay have shorted and are feeding power to the pump.
Does a fuel pump stay running?
Fuel pumps themselves don’t know when to shut off. They are entirely dependant on the fuel pump relay to provide them with power or remove their power. The fuel pump relay is controlled by the PCM by providing the relay with a ground. The PCM chooses to turn the relay on when it sees the motor is running.
Can a Toyota 4Runner run without a fuel pump?
Without gas your 4Runner will not run at all. With that in mind, most of the symptoms of a bad fuel pump revolve around the vehicle stalling out or not running at all. In modern fuel injected vehicles, the fuel pump sits right in the fuel tank and “pushes” the gasoline to the fuel rail (s).
Can a fuel pump run when the engine is off?
So this is normal for the fuel pump (or what sounds like the fuel pump) to run with the vehicle turned off after being driven 4 or 5 hours ago? It must have been running for about 10 minutes, when I put the key in the ignition and turned it to on without starting the engine and the sound went away.
What does a bad fuel pump sound like?
A priming fuel pump sounds like a high-pitched whine for a few seconds and can be heard with a sharp engine right after the ignition key is turned, but before the starter is engaged. The symptoms of a bad fuel pump match a lot of other common problems that can occur in the Toyota 4Runner.
Where is the fuel pump on a Toyota?
It sounds like a small electric pump (sort of a whirring noise) near the left rear tire. Thanks to all for the info. 1st time I’ve ever heard that, and was sure it was the fuel pump, as it was, as said, right near the drivers side rear wheel well.