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Car Fuses and Wiring
Dashboard Lights and Gauges
Late Model 1979-New Ford Mustangs

What would cause the fuel light to go on and off when it gets below a half of tank?

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2004-05-07 11:53:58
2004-05-07 11:53:58

Try replacing the sending unit in the gas tank. if the sending unit is bad it could cause your car to think that it is low or even out of gas.

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If the fuel pressure is too low that might cause the service engine light to come on and , since there would not be enough fuel pressure, might also cause a sluggish response. That could be caused by a clogged fuel filter also.

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Anything that could cause a cylinder misfire can cause the check engine light to flash. A restricted fuel filter is one.Anything that could cause a cylinder misfire can cause the check engine light to flash. A restricted fuel filter is one.

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1st thing to check is the fuel sending unit, second is the guage. go to your local library and find a manual on this car for the specs.

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Yes, a defective fuel cap will make the check engine light come on. It will alert the car that its not getting good gas mileage.


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