Just to get back to the #8 injector for a minute, one injector will not cause your truck to die or not start, just run like crap and down on power. UNLESS, that thing is so bad that the injector Oring from the oil pressure rail is causing a loss in the high pressure oil system and resulting in poor pressure to drive all the injectors but I would think that would throw a code.

Never know, could be losing oil there too explaining the consumption without triggering a code but I doubt it. Now I'm reaching but it could explain quite a few symptoms your engine has.

Eureka, somebody here just recently had an injector sleeve or whatever it was leak that cause horrendous problems with oil or fuel in the coolant. His rig was basically out of commission. Don't remember who but that was his fix. Might want to check the fluids and see if anything is amiss with mixing of any kind.

 

Chad, that was the next thing I was going to suggest before my last post. That compression reading will tell you the most important thing you need to know about that engine. I don't have the numbers at hand but somebody does. Just do it anyway and post the results. If it's bad out of line somebody will tell you.

I would spend no more until then just to know what I was spending money on. You may be in better shape than you thought with that "dusted" engine and can then proceed from there confident that your efforts aren't wasted.

 

my oil gets checked daily due to consumption, no sign of coolant and oil mixing. oil smells a little like fuel, but i don't know if that's normal. not a strong smell. could be semi-normal. but i have been considering injectors and o-rings. i know since this was run in the oil field on relatively raw fuel that i couldn't have been good on the fuel system. plus i'm sure that it was never taken in for any TSB's on the injectors or no one ever did any pre-pump mods. so 7 years of air and bad fuel, i'm wandering how tore up it all is. plus with the oil consumption i keep thinking that the oil is getting dumped into the cylinders at pressure, or maybe turbo (which i heard is very unlikely). In other words I don't think the engine is using oil, but rather getting it fed to it under some pressure. at 6.35 per cylinder for an o-ring kit, may need to do that for the heck of it.
Chad
99 f350 7.3PSD auto cc lb, kwik wix

 

I concur, redo the injector o-rings and take it from there.

 

ok so i'll grab some o-rings, and i know cps is still considered good to have as spare, but on a budget, should I still grab that. Is it sorta general consensus that o-rings for consumption and cps to make it run?
Chad

 

My CPS finally got me last week. Truck only has 45,000 miles. The good part is that it happened in town, without the travel trailer, and when I was alone without the wife and kids. Truck would start, run for 5 to 10 seconds, then die. Started fine each time. I had no choice but to let the dealership change it. Hopefully I'm good for more than 45,000 on this one!

 

what did the dealership charge you to change the cps?......parts AND labor?......

 

Don't go there, certainly you are competent enough to do that yourself. His situatuation was different. He was DOA roadside.

 

That was a "curiosity" question....not a "challenge" question for those not under duress when needing to change the CPS, and who might be unsure about tackling the CPS change themselves.......Just curious

 

Ok, my confidence in you is restored, I just hate to see those bills, but I guess it's good incentive for others to take care of it beforehand.

On edit: I could almost equate it to driving around without a spare tire after reading all the CPS failures here.

 

don't remind me about my spare, still need another tire. lol. got a blue cps for 113 and change including tax from IH, it's late but i want my truck so i'm gonna do this by flashlight and call it really good practice. I'll keep ya posted. and coincidentally, you could buy CPS, cheap taiwan ratchet and socket plus cabfare to and from parts store and truck and still probably end up fixed cheaper and faster than taking it to most stealerships I've been to. I've only gone there for waranty work and recalls. can still take multiple trips spanning weeks for a simple idler pulley on my 6 banger mustang. never again. will keep ya posted.
chad

 

ok so i'm mad. truck is not fixed after cps. runs little better and is a little (stress little) more stable, but i can still kill the truck. it dies when I load the engine. if i turn on the a/c, hold/jab the brakes and start throwing the steering wheel around it will start to surge and sometimes die. I can kill it everytime if i suddenly cause a load on the engine when it goes to stutter. once it hits the 500 rpm mark it's all over. cranks right back and will idle forever when not loaded. fairly stable on a no load idle, which is what I noticed about it after cps replacement. but again this is at night and the truck doesn't have heat of day and asphalt to contend with. so I can't promise cps did anything, but i'm not sorry i replaced it. the o-ring on the old cps was shot and made the front of the engine look like i had a minor front main leak. didn't leak enough to cause ground puddle though. so my thought is fuel pressure or hpop oil pressure (possibly due to shot o-rings, or bad fuel pump or regulator). any ideas. should I have a fuel pressure check, or just start out replacing o-rings. I'm not sure which. When I got the truck, they told me it needed fuel pump, but I replaced filter and it cranked (truck didn't run when I bought it). so i assumed they weren't smarter than average bear, maybe i was mistaken. However I've also been using fuel additives, and marvel in the oil, to make sure all the old remnants of it days of abuse get flush and removed. maybe marvel helped a questionable o-ring finish what it started. since cps replacement, exhaust seems less rich smelling, which is good, but again, it's not burning hot tonight so I'm not making any claims. further ideas guys?
Chad

 

Sounds like your HPOP system cannot keep up with demand. Worn pump, leaking o-rings, leaking IPR valve are what come to mind for me.

 

I shooting for o-rings, seems like they would explain excessive oil consumption possibly. will have to wait till monday before I can grab them. none of the regular parts stores have anything. having to go to a diesel injection shop locally to get them. oh well. I'll get to reading on my service cd about the rest of the system. just to get an idea about the specifics of the rest of it.
Chad

 

btw, out of curiousity, is there a way to test hpop outlet pressure. I mean that would be one mean gauge to do it if there was a guage for it. that would be kinda handy to have. i'm sure if you have a guage capable of 3k psi in oil, someone would charge ya for it, and it may or may not be terribly helpful due to the neccessity of large graduations. food for thought.
chad