injection pressure is @ 730 psi, when cold, then drops to 602 when warm.
Now injector buzz test when engine cold:
1,2,3,5,6 all buzz good.
4,7,8 buzz slow.
When engine warmed up:
All buzz perfect, with new injectors in 7 and 8.
Could this be an oil problem in the rails?
Compression on all 8 cylinders is good: Cold - between 375 psi and 389psi
Warm: 378 psi and 387 psi.
When cold engine misses, when warm miss goes away. With or with out the FU Chip, now.
I think the motor is possessed 
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Thank you and have a great day, Troy Detweiler
I have a '99 F 250 7.3L Diesel w/ a 6 speed Tranny and 4x4.
Mods: Amsoil dual bypass oil filters, Amsoil air intake mod DIY, fuel preasure spring mod(70psi), FU Chip and Burner , 3.73 rear gears, leveling kit (DIY), Stabilizer bars on the rear axle (DIY).
'02 F 350 7.3L, 6spd,4x4,CC, Dually- Just bought 4-15-11
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