Jan 03, 2009 i have a 2005 ford e-350 6.0 diesel. I have had it in a ford garage 5 times and it is still not repaired. It runs fine when cold. After it is warmed up it surges and smokes. Sometimes it will not start after shuuting it off. When i had it towed in and the van sat for a while it runs fine untill it warms up maybe 15 or 20 minutes. They have replace the turbo, egr valves, batteries, cam. IPR 9-11% 18-21% 35-40%. After engine s/n 896812 maximum no load after 3 minutes would be 1800 PSI. The ICP will default to 725 PSI at idle if the PCM isn’t getting the signal. ICP LOW; if the IPR duty cycle% is high, but the ICP is low, it usually means some sort of high pressure oil leak or bad IPR.
2005 6.0 surging at idle
Ok, so as the title says, I have a 2005 6.0 with 182,000 miles. It has recently started having cold start issues when the temperature outside is below 80 degrees. It either won't start or it will surge really bad until the engine gets up to operating temperature. Once it gets up to operating temperature it runs as smooth as it ever did. It will throw a cel and a code for low injector pressure. I have a monitor and took some notes of what goes on at koeo, cranking cold, cold idle, and operating temp idle.
Koeo: ipr is usually at 13/14% Battery is at 11.8 volts Icp is 0.2 volts Ficm is at 47.5 Cold crank: ipr jumps up to 85% Battery jumps between 11.8-12.5 Icp is around 1.0 volt Icp pressure won't go above 250 psi Ficm is at 48 volts Cold idle if it starts: ipr will jump all over the place from 30% all the way up to 85%. Battery is around 13.4-14.1 volts Icp voltage is around 0.8/0.9 Icp pressure will dip down to 540 psi but hangs out around 575-590 Ficm is 48-48.5 Operating temp: Ipr is at 23% Icp is still 0.8/0.9 Icp pressure is 580-590 with no dips Ficm is 48-48.5
I have unplugged the icp sensor while it is surging and the problem goes away. The injector pressure jumps up to 850 and there is no surge. So I tried replacing the sensor already, but the problem still persists.
If I shut the truck off while it is surging, it will not start back up until it gets hot out. It will turn over strong, but will not come to life.
If the truck is at operating temp, I can shut it off and start it back up with no issues whatsoever.
So I'm just curious if I should start chasing a high pressure oil leak or if it may be more an issue with the icp harness. I have also thought it may be the batteries as because this problem started happening when my wife left my truck door open all day and the cab lights stayed on.
Thanks for any help/advice and your time.