The gas gauge/floater is probably rattled around in the tank if you dropped it.
I wouldn't go by that thing.
Get a full tank, reset the odometer.
Drive it until you need to refill again, divide the miles by the gallons you refilled.
Quote:
Originally Posted by Thursday7
If MPG is concerningly low after that, I would look into a fuel injector cleaning and replacing of O rings. Also check resistance on the coolant temp sensor.
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I echo this: Coolant temp sensor to ecu I would recommend replacing if you haven't done that already.