Ok guys, it's back. Same problem from this thread:
No start, help needed - Powerstroke Nation
Truck cranks and won't start. As I crank, I get smoke, indicating that it's firing fuel. I have hooked up AE and datalogged as I cranked for an extended period. No codes pop up. I have tracked RPM's, ICP pressure/voltage/duty cycle, injector pulsewidth, mass fuel desired, and vehicle voltage. Everything is normal. Engine RPM's when cranking are just under 200, battery voltage holds at 11 volts while cranking. ICP pressure rises quickly as it should. Injector pulsewidth and mass fuel desired rises, showing that it's firing fuel. Plus it's smoking while cranking, so it's getting fuel.
I have run diagnostics from AE (Buzz and KOEO). Both tests pass with flying colors.
I have jumpered the glow plug relay using a screwdriver. Still no start. Glow plugs were replaced a few months ago, GPR was replaced a few weeks ago.
It's not the CPS, because it's firing fuel.
It's not a fueling problem. I have a fuel filter in good shape, plenty of fuel, and good pressure holding rock solid at 65 psi.
HPOP reservoir is full, oil level is good.
I took Cody's suggestion to remove power from the PCM. On Monday when I did it, the truck fired up. Today, it didn't. I first pulled the fuse for the PCM keep alive, put it in and tried to start. Then I disconnected the batteries, reconnected and tried to start. Then I pulled the PCM, reconnected and tried to start. None of those worked.
It's not the chip, I've tried starting with the chip unplugged.
It shouldn't be a glow plug issue at all. On Monday the temps were 80 degrees when I tried to start. At those temps, I should be able to unplug the GPR and the truck should still start.
Fuses check out fine, I've already gone through them. EOT sensor is good. Air filter is clean. Batteries are less than a year old... Duralast gold tops. My WTS light comes on and functions normally. Starter is less than a year old, and spins very very very strong.
Monday after trying Cody's suggestion, the truck started. I drove around Monday and the truck ran perfectly fine. Yesterday I drove the truck again. The first time it cranked, it did start funny.... kind of a rough idle and some white smoke for about 20 seconds. However, it did clear up and ran fine the rest of the day.
Now today.... it just cranks and cranks and cranks and cranks.
The truck went on a 3500+ mile road trip, and started every single day. However, that rough start that happened yesterday... I remember that it did happen TWICE during the road trip. Two mornings in a row my truck started up and ran funny for the first 20 seconds, blowing lots of white smoke. Then it cleared up and ran fine for the rest of the day.
Ok guys, I'm at my wits end here. I really am. I've covered just about everything I can think of. Something is going on, and I can't figure it out. I mean, the truck is fueling while cranking. It's warm enough to NOT need glow plugs at all. HEEEEEEEEEEELLLLLLLLLLLLLPPPPPPPPPPP!!!!!!!!!
No start, help needed - Powerstroke Nation
Truck cranks and won't start. As I crank, I get smoke, indicating that it's firing fuel. I have hooked up AE and datalogged as I cranked for an extended period. No codes pop up. I have tracked RPM's, ICP pressure/voltage/duty cycle, injector pulsewidth, mass fuel desired, and vehicle voltage. Everything is normal. Engine RPM's when cranking are just under 200, battery voltage holds at 11 volts while cranking. ICP pressure rises quickly as it should. Injector pulsewidth and mass fuel desired rises, showing that it's firing fuel. Plus it's smoking while cranking, so it's getting fuel.
I have run diagnostics from AE (Buzz and KOEO). Both tests pass with flying colors.
I have jumpered the glow plug relay using a screwdriver. Still no start. Glow plugs were replaced a few months ago, GPR was replaced a few weeks ago.
It's not the CPS, because it's firing fuel.
It's not a fueling problem. I have a fuel filter in good shape, plenty of fuel, and good pressure holding rock solid at 65 psi.
HPOP reservoir is full, oil level is good.
I took Cody's suggestion to remove power from the PCM. On Monday when I did it, the truck fired up. Today, it didn't. I first pulled the fuse for the PCM keep alive, put it in and tried to start. Then I disconnected the batteries, reconnected and tried to start. Then I pulled the PCM, reconnected and tried to start. None of those worked.
It's not the chip, I've tried starting with the chip unplugged.
It shouldn't be a glow plug issue at all. On Monday the temps were 80 degrees when I tried to start. At those temps, I should be able to unplug the GPR and the truck should still start.
Fuses check out fine, I've already gone through them. EOT sensor is good. Air filter is clean. Batteries are less than a year old... Duralast gold tops. My WTS light comes on and functions normally. Starter is less than a year old, and spins very very very strong.
Monday after trying Cody's suggestion, the truck started. I drove around Monday and the truck ran perfectly fine. Yesterday I drove the truck again. The first time it cranked, it did start funny.... kind of a rough idle and some white smoke for about 20 seconds. However, it did clear up and ran fine the rest of the day.
Now today.... it just cranks and cranks and cranks and cranks.
The truck went on a 3500+ mile road trip, and started every single day. However, that rough start that happened yesterday... I remember that it did happen TWICE during the road trip. Two mornings in a row my truck started up and ran funny for the first 20 seconds, blowing lots of white smoke. Then it cleared up and ran fine for the rest of the day.
Ok guys, I'm at my wits end here. I really am. I've covered just about everything I can think of. Something is going on, and I can't figure it out. I mean, the truck is fueling while cranking. It's warm enough to NOT need glow plugs at all. HEEEEEEEEEEELLLLLLLLLLLLLPPPPPPPPPPP!!!!!!!!!