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Yea, I verified it was in fact not self-priming. Before I manually primed the system (which is what fixed it), I did what davidb56 suggested in post #71 and disconnected the return hose at the tank, draped it over the side of the tank pointed at a bucket. Cranked the engine a bunch; nothing ever...

I wonder if it's because the last thing I was doing with the truck was donuts in a snow covered parking lot. Maybe that whipped the fuel around too much? It had never done it before...

Problem solved! I used the cheapo hand pump to pump some fuel into that port on the secondary filter block and it fired right up. Capped the port and went for a good 30 min test drive. Ran great. So it had just lost prime somehow. A bit concerning, considering I had just driven it 3 days prior...

It fires right up on ether, albeit only for a second before running out of it. Here's my plan of attack, based on all feedback: - Pump fuel in from the secondary filter port. This should prime everything from the outlet side of the gear pump, through the engine, and back to the tank. I'll...

I don't think I have any fuel pressure though. After cranking the engine a bunch after the filter replacement, I still wasn't getting any significant smoke out of the exhaust. If anything, less and less. And when I removed the plug in that port on the secondary filter housing, zero fuel came...

Can I use a common fuel transfer hand pump or will it not build the kind of pressure needed?

Doh! I will try that then.

Wait... am I supposed to pump fuel IN through that port, not try to suck air out?

I don't think the pump is pumping. So I tried priming the system using a vacuum brake bleeder but I don't think I'm doing it right. This is per the TM which says to pull a vacuum from one of the ports on the secondary fuel filter housing. Of course, there is a special tool designed for this, but...

Replaced the fuel filter today. Old one (2020) was about 3/4 full upon removal, but also rusty inside. I traced the supply line from the tank and I guess someone bypassed the fuel/water separator at some point cause I can't find it. The fuel goes straight from the tank to the pump then to this...

Fuel filters are from 2020. I will pop them off and take a look.

Here are two more starting attempt videos: Also, for what it's worth, when I take the air filters out and spray ether in for 2-3 seconds, the engine does fire right up for a second, but then dies.

Thanks so much for all the suggestions. I'm only seeing pipe plugs, so I assume there is no flapper in there? Driver side: Pass side: Is this the solenoid? If so, it is fully retracted. I'm able to rotate the lever it's attached to a bit but against spring pressure. The tank is...

We had a ton of rain yesterday going into today, so I couldn't really mess with it. I'm going to dive into it tomorrow. I'll also charge the batteries to full. I'm also wondering if it's worth installing a block heater? If so, I see a couple types available for 8V92. One installs in the water...

The factory ether shot device doesn't work but I will try spraying some regular starter fluid into the intake. I'll check for the shutdown damper too. Is that what is being activated when I press the 'engine off' toggle switch? It just blocks air flow to the engine?

View of the exhaust on today's attempt. 43°F today. Once again, you can hear it want to catch, but then doesn't. I guess it's getting fuel since we see smoke. Those talking about the shutdown air damper - what & where is that? Thanks everyone.

It has not been sitting. I drove it 3 days prior. Ran fine then. It does smoke quite a bit while cranking. Didn't really pay attention to the color. Sort of grey, maybe a little blue? I'll check again tomorrow; I'll take a video. Matt

(See post #73 for solution) All of a sudden my M978 HEMTT w/ 8V92 diesel won't start. It cranks over fine and on the first turn it will sort of cough or sputter a little like it wants to go, but then it just goes cold. If I wait a minute and try again, I get the same result - a tiny sign of...