What it sounds like is bad diagnosis. These are kinda quirky engines and can be a mystery to techs unfamiliar with it.

For example, say a tech runs a cylinder contribution test (CCT) on his fancy-dan scanner to see how each hole is doing it's job. Well cyl 8 always shows the worst. Every. Effing. Time. Only the Lord and a laughing accountant at IH knows how many injectors have been replaced for absolutely no reason. It shows worst because it fires after 6 which is immediately before it in the fuel flow, so the fuel pressure available to 8 is always less. So a bit less fuel gets injected and voila, cyl 8 shows as "bad". Completely normal.

But anyway, sounds like 2 problems. First check the coolant res again for fuel. Fuel there is often a result of failing injector cups. Which is not a fun job, from what I hear. The other diagnosis of bad wire harness makes sense, that fault crops up regularly. It will often show as a P1316 code. Let us know any codes you have. The fix is new under valve cover harness, aka UVCH. And sometimes the VC gasket or wires that connect to it. What happens is the harness inside the VC loses connection and the voltage arcs across the gap, that makes heat and melts the plugs and harnesses till they don't work anymore. Often you can see it inside the harness that connects to the valve cover, pop it off and inspect for burnt pins or melted plastic.

And think about when the missing occurs. Does it happen only when the truck is warmed up? That could be IPR going south.

 

First step is to find a new shop. Second step is to look under the hood, post pictures here if you need to and see if you can figure out what they did or didn't do. Also, what exactly does the description on your invoices say?

The only "tube" that goes from injector to injector are the rails that are drilled through the heads to connect the injectors for fuel and high pressure oil. Since the "tube" is actually just a hole running through the head, there is no "tube" to fix. Fuel in the coolant likely should have been an injector cup replacement. If that's what they did, how many did they do, and did they give you the option of doing one side or all of them as long as they were in there? Did they install new o-rings on the injectors when they put things back together (if they did replace any cups)? Did they show you the "bad" wiring or was it possibly something they just either didn't plug in all the way or maybe they broke a retaining clip on the harness.

 

Your shop sounds incompetent, at least on 7.3s. Where are you located? Someone on here may know a good option. It's best to find a shop that has experience with this engine as it has several major issues that are pretty unique.

 

Yeah 1st step is to run from that shop as fast/far a as you can. A tube or hose that goes from injector to injector? If that is their words/invoice get ahold of the BBB, absolutely no such device on these motors.

As mentioned above the fuel goes from the fuel filter bowl on top of the engine into the heads thru a internal fuel rail to all injectors. Sounds like the injector cups failed, if it was bad injector orings the fuel filter would be black from mixing oil into the fuel.

 

Does the receipt for the work state specifically what was replaced or repaired. You might have a case of fraud on your hands based on what you have told us.

I echo what Beef **** has asked, where are you located? We have a great network of people that will reference a good shop near you if it is needed. Most of the time though, we can help you resolve the issue yourself if you keep feeding information and pictures if needed.

 

Tubes or hoses from injector to injector? Run.......fast.....after you go back to that shop and choke someone out to get your money back.



Hmmmmm, 1st post and hasn't been back? Yeaaahhhhhh.......

 

That right there is total BS, there is no such part. The rest sounds like they might be guessing at stuff. Find a new shop and consider getting your money back from this one.

 

I suspect the OP was told about cups and rails in the heads and just didn't understand. As Byron noted he also has not returned since 1st post.........

 

Well he did score that sweet "7.3 superduty" handle, so maybe his luck will hold and it's not the cups.