Help starting dt466e

[MambaJack]

Started and ran a little bit two weeks ago but doesnt want to start today. Have tried several times. A couple it seems to be almost running like 6 or 8 revs then dies. Thoughts?

[Doe69936]

Do you have the ability to read the icp pressure?

[MambaJack]

Maybe. What is that? How do I do it?

[MambaJack]

https://youtu.be/wkhGWePlIzw

[Doe69936]

The cheapest way I know of is with a scam gauge d it's the ignition control pressure if it's not getting at least 500 psi at cranking speed it won't start

[MambaJack]

Is this lack of pressure something that would be common even though it started a couple of weeks earlier?

[Doe69936]

It's the most common with power stroke and until you can rule it out you probably won't be able to diagnose it any further

[Doe69936]

Here read this

[Doe69936]

Read this it should get you startedford-7.3-94-03-diagnostic.pdf

[ewo1]

Originally Posted by Doe69936

Read this it should get you startedAttachment 31898

I have started a "diagnostic" folder for which I plan to keep in my bus for times when I have engine problems and need immediate help.

So if I break down on the road, I get to go to my "Diagnostic" library !!!


TO Doe69936,
Thanks so much for that PDF , lots of great info in it!

[ewo1]

Originally Posted by MambaJack

Started and ran a little bit two weeks ago but doesnt want to start today. Have tried several times. A couple it seems to be almost running like 6 or 8 revs then dies. Thoughts?

Here a really good video that shows how to perform a simple check to see if your injector O-rings are leaking by injecting low air pressure into the rail.

https://youtu.be/wkhGWePlIzw

[Native]

You will want to charge your batteries. I noticed that the volt meter showed less than 12 volts the whole time.

[MambaJack]

Are there a lot of similarities between this engine and the dt466e i guwaa?

[ewo1]

Originally Posted by MambaJack

Are there a lot of similarities between this engine and the dt466e i guwaa?

I am not a mechanic, professional one that is, but from my understanding the HEUI system which was developed by cat and licensed to International...the theory of operation is the same.

You need high pressure oil to fire the injectors.
So if you have thinned out oil, an internal oil leak (bad O-rings), these conditions would create a scenario that while you are cranking you just can't build up enough oil pressure to fire the injectors.

I was watching some you tube videos on this and saw one engine that would fire up when cold, run all day just fine, but when you shut it off and went for a restart, it would not start.

In that video you could clearly see that the "COLD" start the engine cranked a long time before it started.
On this particular video it was two things causing the no start.

One was a blown o-ring on the injector and the other was the turbo vgt was stuck, would not cycle thus complicating the no start scenario.

Hope this was helpful...

[Doe69936]

I've got more files if you need some I've done the same thing collecting information also I've worked on quite a few 7.3 motors and had probably most of the oil pressure related problems there is to have and I assure you without some form of scan gauge that can read icp pressure your in deep doodoo on no start scenarios but with that bit of information I could probably walk you through figuring it out

[Doe69936]

Originally Posted by MambaJack

Are there a lot of similarities between this engine and the dt466e i guwaa?

Same ignition system as in all power stroke 7.3 or 6.0 motors in buses or trucks

[MambaJack]

I saw that figured maybe it was just wrong, I wonder if that is what is causing the actual issue

[MambaJack]

In the scope of the cost building my skoolie, this isn't tall that expensive. Is the Scan Gauge D the best option, or are there others out there that are money better spent?

[MambaJack]

Went ahead and ordered one of these, thanks

[Doe69936]

Its the cheapest that gets the job done as for the voltage you need to be getting a minimum of I believe it's 100 rpms at starting off the top of my head