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2026. 6. 30. 작업

난이도 & 준비물

난이도 쉬움⏱ 예상 30~60🔧 잭스탠드

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Is it really not advisable to let your fuel tank get low on fuel?

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The problem with running the tank low in older cars is that the fuel cooled the fuel pump. The fuel pump would just hang out in the bottom of the tank with all the fuel and the fuel would wick away heat. When the tank gets low the pump is no longer covered by the fuel. With little fuel covering the pump, the pump gets hot. The pump wears more when its hot and just doesn't like to be hot. There are instances where filling an empty tank with with cold fuel causes the hot pump to contract and the car not to start. Most if not all new cars use a fuel pump module where the pump sits in a big plastic cup. That cup is always full of fuel to cool the pump. The cup only runs dry as you completely run out of fuel, but then your only running another minute or two. These vehicles are not affected by low fuel unless you run out completely. Sediment is not a big problem unless your getting fuel from unrespectable places. As you can see from both pictures, both pumps have a input filter (sometimes ca

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