Only 40lbs at idle and 25lbs at WOT dual 255's 408ci
05-05-2013, 10:41 PM
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Only 40lbs at idle and 25lbs at WOT dual 255's 408ci Car ran fine the last few weeks then a few days ago started breaking up above 2500 rpm. Trying to go WOT car stumbles bad and falls on its face, doesn't sound quite right at idle either, not as crisp. Hooked up a fuel pressure gauge and saw a high of 42lbs right when I turned the key then stays at 40 idling and cruising at 2000rpm. Going WOT as the car is stumbling and sputtering the fuel pressure drops the whole time. I saw it go down to 25lbs before I ran out of room. I changed the fuel filter before I checked the fuel pressure. Car has dual Walbro 255's, 42lb injectors and a 408 iron block. No SES light on the dash but I will run a basic scanner on it tomorrow and hopefully meet up with a friend who can log it with HPtuners. Anybody have ideas as to the low fuel pressure?
05-06-2013, 11:58 PM
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Looks like the Old Geezer was right! Pulled the whole pump assembly from the tank and it turns out one of the rubber hoses going from the pump into the Y of the main feed line had a hole in it! Thanks for your help guys!