I've had a 7.3 stroker fire on ether. not smooth running but it fired the motor up and died when it used the ether in the intake.

 

Do you really think the motor has no compression...

Sounds like Ford did a leak down test on the HPO system, which again leads me to believe your issue is the HPOP...

Get someone that can watch duty cycle and ICP while you crank.

 

I mean.. the motor DID kinda-sorta run for a few seconds.. the motor wasn't full-blown alive-running.. but it did half-a$$ed really quietly run for a few seconds using the ether.

I dont believe compression is low.. hell now. That doesn't make sense on that motor to me. So are you saying that the ether-test is bs, and that doesn't exactly mean there is internal damage?

Does the tachometer not registering have anything to do with this?

EDIT: And could Ford do this leakdown test with no motor oil in the truck?

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So I was talking to a buddy, and he said that since there was tons of smoke coming out of the stack when spraying the ether in the truck, that it WAS burning the ether. Which makes sense to me... obviously the motor was compressing it and igniting it in some way shape or form, for it to be blowing out of the stack??

 

One other thing to check... Pull the top of the reservoir off and see if there is even any oil in there. It could be an issue with the Low Pressure Oil Pump (LPOP) not even feeding the HPOP. As indicated earlier, the injectors won't even activate until ICP has reached a sufficient level.

Do you have access to a scan tool? If so, monitor ICP, IPR, and RPM. Those three things need to be in line or the engine won't crank.

Good luck!

 

I know this isn't quite the same as pulling the reservoir.. but I accidentally didn't press the pass-side oil line into the head tight enough and it was leaking oil out of that line. So i'm pretty certain the hpop reservoir is full

 

Trucks with intercoolers on them do not just fire on ether as easy as a truck without the cooler will. You have to spray wayyyy too much ether to get them to run and thats not good..... You really need to scann this truck while cranking.... IPC nned to be close to 400 psi and you need cranking rpm indicated...... You can put this hole oil level thingto rest by checking the upper resevoir. It needs to be within one inch of the top..... Crank Sensor or HPOP are probably gonna fix this.. scan it to save money...

 

My dad had the same problem with his 98 7.3, ford said the o-rings in the injectors go bad and dump oil in to the fuel tank. that would be a place to start if everything else looks good

 

^Good info guys... appreciate that. I'm waiting to hear back from the guy unfortunately.

 

I just registered and subscribed to this thread. I just had this very thing happen to me Friday. I run two online businesses and we're also in the middle of a remodel and add-on (just think HECTIC!!!!) so I can't jump right on this - and don't need to as I have spare trucks to drive but my old trusty '99 F350 is my favorite truck. Only has 294,000 on it so when she laid down just as I pulled out of my driveway I was not thinking anything serious.

I had just had the oil changed Thursday and driven it pretty much straight home which is about 15 miles from town and parked it. So Friday as I'm loading up the orders I am running against the wire (as usual) to make it to the post office in time. I crank it up and immediately throw it in drive, haul **** to end of the drive and romped on it. Not floored as in spin the tires (which it will do -it's chipped) but gave it plenty of reign.

I got up to about 60mph and she bogged down, throwing me forward even as though I'd hit the brakes fairly hard. Not slammed them on but as if it had suddenly started running on gas. If you've ever put gas in your diesel you know what I mean. No power at all and just barely putters along.

So I did tap the brakes to bring it to a complete stop, and the way it was barely running I knew there was no way for me to turn around so I began backing up the slight incline but no dice. She got about 50' and died completely. i walked the short distance back to the house and the wife and I towed it home. i didn't even pop the hood until yesterday my nearest neighbor came over and we got to talking and one thing led to another and i decided to pull the dipstick to see if there was water in the oil. But there was not oil on the stick! Just one tiny drop actually.

So that's where I'm at. I intend to put some oil in it and see if it'll crank even though some of the more experienced members here do not believe that will do it. I'm a hard head. Won't be able to get to it until this afternoon (have to send the wife to town to get the oil) but I'll update y'all when I do it and give the results.

I hope it's nothing major and 85_305 I hope the same for you.






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I would suggest making another thread so you get more views; but you may as well have a bad hpop. Good luck man