Diesel died last night

Driving home, my 03 7.3 just up and quit at highway speeds. Safely pulled over and got a tow. It was showing about 1/8th of a tank. I added 10 gallons. I've been cranking it over but no start. Ideas?

Have you checked the oil level? Low oil will starve the HPOP and lead to no fuel being injected.

When you crank, do you get any smell / smoke out of the exhaust?

RIP

Crank angle sensor. 10 min fix. It's on the front of the engine and are known to go bad and stall the engine suddenly .

On many cars with a tach, the tach will bounce or go to 2-300 rpm during cranking. If it did before and now stays at 0, that's anecdotal corroboration of the crank sensor idea. Of course, a scan tool would be far more precise if you know someone who has one or are ready to pick one up. A cheap OBD2 bluetooth adapter and a phone app are usually cheaper and far more capable than even the cheapest code readers these days.

PMRacing wrote: Crank angle sensor. 10 min fix. It's on the front of the engine and are known to go bad and stall the engine suddenly .

Damn. Famous on these. Can't believe I forgot!

Died while running sure sounds like a CPS on a 7.3 PSD. Remember there was a recall on these and an improved part#, etc so you may be able to get it free from the dealer.

I think the general consesus is to go Ford OEM on these.

Oil level is at the top. Not much smoke out the back so it may be fuel but I'm going to ford for a cps just in case. Wish they had better hours Already closed.

Just remembered to check tach movement when I turned the key Nothing. So probably cps

02 and 03 7.3s do not bounce the tach during cranking. 99-01 do.

Get an actual scanner and see what you have going on. Or punt and replace the CPS and see what you get.

I'm going to try the cps because the next obvious issue is fuel pump?

markwemple wrote: I'm going to try the cps because the next obvious issue is fuel pump?

Normally I saw ICP sensor issues with a low hpop oil reading which can cause a no run no more problem. That's because without enough oil pressure the injectors won't fire and the computer will shut down.

Should be no hpop issues. It was running fine.

Also no SES light

If you're going to fire the parts canon at it the the CPS is the part to throw at it first. After that I'd get a good scan tool on it and see what's really up because it could be anything.

When mine did that it turned out to be the CPS. Cheap and easy fix.

Replaced CPS. kicking but no start. WTS light is coming on and going off like normal.

Pull the codes.

Don't have a way

Go on one of the Powerstroke boards and see if someone local to you has autoenginuity and can scan your truck. I'd do it if you were local.

A regular scanner won't work, right?

markwemple wrote: A regular scanner won't work, right?

It should be able to read a standard OBDII code, but something that speaks Ford will give you more info (especially if you don't have a CEL and probably no OBDII codes).

Maybe the CPS died and at the same time it got low enough on fuel that it got air in the system? Weird timing though. Have you run it below 1/8 tank before?

Powerstrokes of that vintage don't really get air in the system per se as the HEUI injectors are their own pumps. As long as you are getting low pressure fuel to the rails in the heads, its bled enough to start. May rattle and run rough for a minute but doesnt need to be bled like a conventional diesel with a remote high pressure pump.

If you are just trying to diagnose it, open up the fuel filter in the V of the engine and make sure you have fuel there, you should also hear the low pressure pump run with the key on.

You can also remove a plug on the top of the high pressure oil pump and make sure your HPOP is reasonably full of oil, no oil in the HPOP reservoir is no bueno.

In checking things, I knew my GPR was acting up. Discovered that the pole that delivers 12v was almost broken off and is now broken off. Could this be the problem?