Big-Black-Beast
Registered User
New member here, first time poster, long time reader. I have a beautiful black '89 f350 long bed single cab 7.3 n/a with the zf5 sitting on 35's that i absolutely LOVE!!!! The past week however has me dangerously close to shoving it off a cliff and walking away.
My problem all started with a bit of blue smoke and surging that got worse and worse to the point where 60mph required having my foot in it all the way to the floor. So I decided to put in a new lift pump, bad idea. Ever since then things have gotten worse and worse to the point where it will only run for about 30 seconds and die. And before anybody says to use the search option I've tried that for hours upon hours.
Here's all that I've done so far; two new lift pumps, the p/o eliminated the rear tank so there's no selector valve/switch, I've eliminated the hose going from the #5(?) Injector to the water seperstor housing, new filter, the Schrader valve was eliminated by the p/o, the injectors are fairly new (p/o), so are the glow plugs, the glow plug controller has been eliminated. I'm sure there's some things I'm missing. Now here's what I know there's definitely pressure at the water/fuel seperator housing and it's not leaking back to the tank because my fuel filter is completely full when I remove it. Which leads me to believe my problem is somewhere between my injection pump and my fuel return line.. and like i said the fuel return connecting the water fuel seperator has been eliminated but prior to it's elimination i had a clear line hooked to it and I did indeed have air bubbles in the line. I went and bought 5 gallons of fuel and dumped it in the tank in hopes of elinating a broken shower head as the culprit. So what I've narrowed it down to is either A: my olives are bad and I have a blocked fuel line or B: somewhere I'm getting air in the system like either the injector o-rings or the fuel return to the tank. My only issue is wouldn't that have been somewhat remedied by my removal of the fuel return being connected to the filter housing. And just so we're all clear here the last thing I want to hear is that I have a bad injector pump. So any ideas or insight would be more than helpful.
My problem all started with a bit of blue smoke and surging that got worse and worse to the point where 60mph required having my foot in it all the way to the floor. So I decided to put in a new lift pump, bad idea. Ever since then things have gotten worse and worse to the point where it will only run for about 30 seconds and die. And before anybody says to use the search option I've tried that for hours upon hours.
Here's all that I've done so far; two new lift pumps, the p/o eliminated the rear tank so there's no selector valve/switch, I've eliminated the hose going from the #5(?) Injector to the water seperstor housing, new filter, the Schrader valve was eliminated by the p/o, the injectors are fairly new (p/o), so are the glow plugs, the glow plug controller has been eliminated. I'm sure there's some things I'm missing. Now here's what I know there's definitely pressure at the water/fuel seperator housing and it's not leaking back to the tank because my fuel filter is completely full when I remove it. Which leads me to believe my problem is somewhere between my injection pump and my fuel return line.. and like i said the fuel return connecting the water fuel seperator has been eliminated but prior to it's elimination i had a clear line hooked to it and I did indeed have air bubbles in the line. I went and bought 5 gallons of fuel and dumped it in the tank in hopes of elinating a broken shower head as the culprit. So what I've narrowed it down to is either A: my olives are bad and I have a blocked fuel line or B: somewhere I'm getting air in the system like either the injector o-rings or the fuel return to the tank. My only issue is wouldn't that have been somewhat remedied by my removal of the fuel return being connected to the filter housing. And just so we're all clear here the last thing I want to hear is that I have a bad injector pump. So any ideas or insight would be more than helpful.