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Old 01-01-2018, 03:48 PM   #15
RichardJ
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Join Date: Apr 2010
Location: So Cal
Posts: 1,490
Re: Problem starting truck after sitting overnight.

For an overnight problem, you need to check the fuel lines between the tank and the fuel pump. A small leak there will allow the pump to pull fuel from the tank and air through the leak. It will run fine with no indication of a leak. With the engine off, fuel seeping through a small leak can evaporate fast enough, it will never drip on the ground.

Wrap a rag around an air nozzle and with the air pressure set really low, blow air into the fuel tank and hold. Have someone visually inspect the fuel lines for a leak.
If no leaks are found, I'd suspect the fuel pump.
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'67 GMC 2500, 292, 4spd, AC
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