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Old 11-21-2009, 20:50   #1 (permalink)
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97 F250HD w/ 5.8L Fuel Hydro-Locks #8 Cylinder

97 F250HD w/ 5.8L Fuel Hydro-Locks #8 Cylinder
I have a 1997 F250 HD with two wheel drive, an automatic transmission, and a 5.8L that is fuel hydro-locking the number 8 cylinder when cranking to run. The fuel has been entering the block.
This is what I done so far:
Removed the oil pan, cleaned out the oil /sludge, (truck sat for a bit without oil it hardened in the pan.) replaced the oil, filter and oil pan gasket.
Replaced all of the fuel injectors with rebuilt units. Tried to start the truck, never started, then still the fuel is completely hydro locking the motor in the #8 cylinder.
Removed the spark plug, cranked the motor to drain the fuel.
With the spark plug removed, unplugged the injector, cranked the motor and fuel filled into the #8 cylinder. The coil wire was unplugged.
Removed all of the spark plugs, turned the motor by hand to drain the cylinders/check. Found fuel in the #8. The coil wire was unplugged
Replaced the #8 injector with an old unit. Installed all the plugs, plugged in the coil and cranked to start. Motor started, ran badly for less than 5 seconds then died. Cranked the motor sever more times, motor once again hydro locked. Removed the spark plug and fuel leaked out of #8 cylinder. Turned the motor by hand to drain the fuel.
My question is what is the problem and how do I fix it? Thank you I am lost…
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Old 01-27-2010, 17:42   #2 (permalink)
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Re: 97 F250HD w/ 5.8L Fuel Hydro-Locks #8 Cylinder

I am not exactly sure what the problem might be, my thought would be to check the valves. A stuck valve may be contributing to this problem.
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Old 01-27-2010, 18:55   #3 (permalink)
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Re: 97 F250HD w/ 5.8L Fuel Hydro-Locks #8 Cylinder

Moved to the Ford F-150 | Ford F-250 | Ford Super Duty | Ford Diesel section
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