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2003 4.3l Fuel System Problem

ryn0909

By ryn0909
in Ask A GM Technician

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ryn0909 Enthusiast

ryn0909

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No engine codes, new fuel filter, 3/4 tank of fuel, engine has 60,000 miles. For the last month the problem has been getting progressivly worse. Here is the problem..... Driving at any constant speed, the engine will suddenly cut out for about 1 or 2 seconds, it acts basically the same as if i were to reach the top speed limiter. I did notice when i turn the key on and after the fuel pump goes through the cycle and stops, i hear a sound near the fuel tank that sounds like an air leak. It only makes the air leak sound, after the fuel pump stops. The sound will last anywhere from 3 to 15 seconds and then it goes away. The engine starts just fine and runs great, when it doesnt cut out.

ALSO.......... i have ran the truck out of fuel Several times, and drive it quite often on less than a quarter tank. any assistance would be helpfull thank you

ryn0909 Enthusiast

ryn0909

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Posted

no i havent checked the fuel pressure yet. where would be the location, to tie into, to check the pressure? If i remember correctly, the pressure needs to be between

58-62psi, is that correct? where is the fuel pressure relief valve located? i do appreciate all your help, today the problem got even worse, to the point that the truck died on me and i had to wait almost a minute before it would start.

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