Low oil volume will keep the injectors closed so the truck will not start up. 2-3 qts is not that low.... 7-8 is what will cause a no start due to low oil. (yes I know for a fact )

 

Good info., and nice photos and illustration Ken. Thanks for posting these.

 

Ken I knew I could count on you !! You are just a vast wealth of knowledge. And thank you for sharing some of it. I am saving this one for my book. That and great job on the jig for the dial indicator. Does anyone actually sale one. Good stuff thank you.

 

Hope I am not High Jacking. I had my recall done last summer and it went bad in January. The one they replaced was not the original, guy I bought it from had alraedy went thru a couple. When the last one went bad I had just finished pressure washing. At first it cranked and after pulling it into shop to chase down oil leak it would not start back. Mechanic at work had one, replaced the other and it fired up. He was the one I purchased truck from and kept a spare. Told me I should do the same. Noticed one of your replies mentioned moister and decided to throw this out there. Got to get me another spare.

 

Thanks for the compliment! Most of what I have learned about our trucks is from other members. I read almost every post and the outcomes. This makes it easier to help others! This site has some extremely knowledgeable members and we all get to learn from everyone's experiences.

You can buy a tool specifically made for measuring the air gap. Look at this Cam Sensor Measurement tool price is $376......which is why I machined my own

 

OH MY GOD !!.... I just fell off my chair no wonder you made your own tool. Well I guess I won't be doing any testing like you did. Luck for me you alread did. That is as much money as AE software. And AE is on my wish list. Will or how will AE let you know if it is a CPS is bad ?

 

AE will not "see" the RPM signal, so that would be a good indication. It would also throw a code and allow you to see that you have an issue with the CPS.

 

Here is an update... I was driving on the interstate the other day and the truck died again, just when it warmed up about 15 miles out. I was near a dealership so I had it towed. Just got a call from the dealership and they said there was a high pressure oil leak, they think it's the injector o-rings. I had told them the history ect., I thought it may be the IPR although he said it's very rare they go out in the 7.3. I don't know that I believe that, I am just hoping the problem is fixed. If I get it back only to die again, I'll be awfully upset. They are looking at about $1000 to replace the injector o-rings. I know I could do it myself for next to nothing, I just don't have the time any longer to do that stuff. I sure don't like the shops, I always get robbed (to put it nicely)! Feel like I should pick up some lube and practice touching my toes if you know what I mean . Oh well, I guess if it's fixed, all is well. At least I'll know the o-rings will be new. I'm going to start replacing all sensors and commonly failing components. I know I now have at least 3 spare CPSs! I will post when all is resolved...

 

injector o-rings?

The Dealer will be replacing a lot of parts that are not causing the problem. I hope that you and the Dealer have a 'plan B' after you pay for the new o-rings and you are calling him from the side of the road with a dead truck. I guess you can wait 15 minutes and it will start right back up..... again... and again... (IMHO)

I hope that I am wrong and this will fix your problem.... but I don't think that it will.

 

There is nothing wrong with you CPS it just got water around the o-ring or into the connection. Dry it out and seal it up. And it you would like keep a 'dry' on in the glove box.

 

Did I miss it somewhere

Have you had the 'codes' read on your truck? Shutting down like that will throw a code.

 

Well, I hope it is the problem. As I said, I don't have the time to work on it and now I'm at the mercy of the stealership. I have been having some significant oil usage and the fuel filter was pretty black when I changed it the other day.

Actually, I just called back and had a pretty extensive talk with the service manager. He said the only code was the ICP high or low pressure. I told him that I pulled that plug when the engine died and it looked like there was a bit of oil in the connection. If I recall, that can be a sign of a bad sensor? Anyway, he was going to have the tech check that. He said the motor would not start even after sitting overnight. That may indicate part of an o-ring is missing and can't build pressure. I also mentioned the wiring harness under the valve cover. He said they were going to pull the valve covers and remove the HPX tube and dead head the rails so they can determine where the leak might be. He assured me they wouldn't just replace the o-rings unless they found an injector leak. He also assured me that they would go through everything to find the problem.

To be fair to the shop, they are primarily a truck dealership and do extensive diesel work on everything from F250s and the like to busses and trucks, always have. I would feel much less comfortable if it was at one of the other dealers in the area. After talking with the service manager, I felt a bit better, he explained they have dealt with this same issues on many occasions.

Plan B, kick the guy in the nuts. I am going to make sure they drive it and the problem is solved.

 

I apologize to you.

It is just hard for me to trust "Dealers". It sounds like you have an honest one there.

 

Just out of curiousity, how much would you want to make me one? Being a diesel tech, that would be awesome to have on repeat 7.3 CMP failures!

 

I sure hope it works out! I have never had a good experience with dealer service. I will post when all is resolved.
Steve