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Old 03-29-2005, 03:46 AM   #8
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Default Re: Excessive Gas Use

1948SD....I once had the exact same problem with a pick-up truck. No evidence of a fuel leak anywhere. As I was checking around under the hood looking for a leak with the engine idling, I revved up the engine a little bit and then I saw the problem. A fitting on the fuel pump had a very slight split in it and with the engine running at anything ABOVE an idle, the fuel was spraying out of the fitting. It was such a fine mist that it evaporated immediately and never had a chance to make anything wet enough to show a leak. The slight increase in fuel pressure when driving was just enough to spray the fuel out and evaporate before wetting anything down to show where it was coming from. .....Jay