Crank No Start

[ikeG]

A LLY was drug in here for a crank no start condition. It makes over 4k rail pressure while cranking, has cam signal, no smoke out tailpipe at all, wont run on ether. He has 2 cans on the passenger seat so im going to ask him if its had a hard start issue for while .... Any ideas?

 

[2004LB7]

Run a compression test

Check if the FICM is actually powering the injectors

Find out history. Was other work recently completed on the engine? Or did it just stop working one morning?

 

[ikeG]

The power cable running from the mega fuse to the glow plug controller is corroded off, so I wonder if he's been hosing it with ether for quite some time.....

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[2004LB7]

The power cable running from the mega fuse to the glow plug controller is corroded off, so I wonder if he's been hosing it with ether for quite some time.....

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Good news is, without working glow plugs, that lowers the risk of using ether ?

 

[darkness]

Find whatever’s blocking airflow.

 

[ikeG]

Customer says it shut off on the road, no prior problems. No hard starting either, the ether was used only after it shut off last week. Scan tool says it has cam signal but i can see the 12v reference wire at the CMP sensor connector is heavily damaged, if not broken off. Gonna start there. I did check for power and grounds at FICM connectors.

 

[2004LB7]

It does sound like an FICM issue but that should bring codes with it. At least a lost communication code if it is fried

If the engine looses cam signal it should keep running. But not restart. So, shutting off on the road doesn't sound like cam. Crank sensor will do that though

 

[ikeG]

Repairing the wire made no difference. Only codes it has is for the gpcm and a p0700 for a p0755

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[2004LB7]

Wondering if there is a mechanical issue as you say it won't run on ether. Maybe valves or rockers. Did you do any compression test?

 

[ikeG]

I borrowed a known good FICM from a local here and truck still crank no start with it plugged in. Ill get to doing a compression test.

 

[ikeG]

Passenger bank is all 390psi or higher.
If i crack an injector line, it will not make more than a couple hundred pounds of rail. Just dribbles out rail while cranking. But as soon as I tighten line back up, it will go back to making 4500 psi. Which is less than desired but should not keep it from starting

 

[2004LB7]

Passenger bank is all 390psi or higher.
If i crack an injector line, it will not make more than a couple hundred pounds of rail. Just dribbles out rail while cranking. But as soon as I tighten line back up, it will go back to making 4500 psi. Which is less than desired but should not keep it from starting

This is my experience too

Might need to break out the scope and probe the injector control and command. Make sure the ECM is actually trying to fire the injectors and that the FICM is trying to power them too. Also, no replicated crank signal to the FICM will cause the FICM to not output even with an input control signal

You verified the FICM has power?

 

[ikeG]

This is my experience too

Might need to break out the scope and probe the injector control and command. Make sure the ECM is actually trying to fire the injectors and that the FICM is trying to power them too. Also, no replicated crank signal to the FICM will cause the FICM to not output even with an input control signal

You verified the FICM has power?

Ficm has power and grounds. I don't have a scope. I'm gonna check the reluctor wheel and swap in another crank sensor.

Crazy thing, another one was towed in today. Crank, no start, but blows the ficm fuse as soon as you put a new one in. So that one will be easier to diag lol

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[ikeG]

The puddle on the floor from cranking with the injector line loose is water, not diesel. Lol. I'd say he has a tank full of water.

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[2004LB7]

Wow. So, maybe it was injecting but water is very hard to ignite. Makes me wonder how much rust might be in the injectors and fuel lines/rails.

I assume the water sensor on the filter was broken....

 

[TheBac]

?‍

 

[Cougar281]

That would do it.... You think he got a tank full of water from a station?

 

[ikeG]

Yes, no wif sensor wires at all. I plumbed a jug of fuel straight to the filter head after blowing lines out. Primed and cranked for a bit but fired up and runs great.

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[2004LB7]

Awesome. Sounds like the owner dodged an expensive bullet on that one

 

[TheBac]

Issac, what the heck is it with people around your area? They things you see and have to deal with are crazy.