fjh

Bro Its Either shutting down on High coolant temp Low oil level low oil pressure Low coolant level usually will not shut the engine down ! Low oil level Sum times depends on programming! I would Lean heavy towards replacing oil preasure sensor! These are or have be a pain in the as from time to time! By the way create your own post for this you will get better press! More guys alot smarter than me ! will respond to a new post!

If it is a shut down by lack of oil pressure or over heat low coolant it should have codes it would also give you a one minute warning before shutting down! You need to clarify more info better help!having said that it issued garbage truck rat chewed wiring is common on these! Yup could be a. Wiring issue

Not sure they are fixable! you can maybe improve but fix not so much

Thanks Terry thought I was just stupid or something!

They created a steep service kit for trucks doing this kind of work It involves moving the breather vent from the existing spot on the front of the engine to the valve cover! If you know someone that can aluminum weld you can make your own valve cover to accept the breather!

Again ! Is the guy driving in the power band 1400-1700 is an example!1200 -1850?Most engines have a sweet spot!

AMEN!

Short answer to yes Everyone uses cheap wire it keeps us folks that work on em employed! We have gone from repairing trucks for a living to chasing gremlins for a living! Ghost busters revisited! All thanx to cheap wire and dollar store sensors and half baked computer programming!

Unfortunately there are a few special tools to do this job in the truck and the parts will not be cheap these parts are usually available thru PAI at a bit better pricing how ever it will still be pricey! Just saying!

Just a small correction to the above note! 😂 Two fairly quick and easy checks and repairs would be checking the range shift cylinder o-rings. #1 in the picture could be your culprit for jump out of low range, if you have oil in this cylinder you definitely have a bad seal. >>>Firstly<<<, check the yoke bolt is tight on the back of the transmission. The range cyl can be removed with out taking the trans out as long as you can make the room under the cab /exhaust out of the way to get the rear lid off!you need about 8 inches!

Your looking a a 3000 dollar repair in my mind i would do the fuller

Are you saying putting a little vacuum to it is just a way to check it? YES >>>It just will not hold power at high rpms, gradually and smoothly "derates" itself <<<< this comment Raised my Eyebrow !

If you can determine which cylinder is causing the issue these pumps have a track record For the delivery valve washers cracking Its a simple fix if you have the right socket to remove the delivery valve! If you have a fuel shop near you? you could stop by and have em check this!

Are you positive you need more rpm? It maybe be the puff limiter has a hole in the diaphragm! remove the hose from the manifold to the puff limiter and suck on it if it will not hold vacuum you have a compromised diaphram!

That small hose comes from the air governor same one that controls the compressor Once system preasure is reached the governor and that line signals and unloads the air drier till that line has no air on it the air drier stays in the unloaded state! Do you have the lines plumbed to the right ports in and out! just asking? Is it an exact replacement or is it retrofited ! I personally like the Good old AD9 air drier might get flamed for this comment how ever My opinion! Tried and true!

The Shut down light would come on first! before this would happen all three are a one minute warning before shut down! I would be checking the vmac plug on the fuel pump! take it apart and put it together half a dozen times and try it see if the situation changes! if it does you have two choices have the plug repined at the dealer IF THEY CAN FIND their special crimping tools OR hard wire the pump to the harness! just a thought!

Hows your charge air cooler any boost leaks? shouldn't have black smoke under load unless your lugging it! an over fuel /lack of air situation may be causing this issue ! also if you have a viscus fan are you sure its working correctly?

Because of the year of this truck it could be computer controlled or mechanical fuel pump you need to clarify this! Joe h has mentioned a very good point replace the accessory relay .check your battery and starter connections

Yup I would have thought you would have had more poor starting symptoms with a pump that bad! the loosing prime thing happens more often than a low power complaint! We had the loss of prime thing happen the last week ! We checked ALL the normal things with no luck pressure was ok but fluctuating some so we changed out the pump! Once the pump changed ,ALSO no luck we were stumped ! The truck would run after cranking for ever to get it to start If u turned it off it would not start a minute later! reminded me of an MP engine with bad cups ! So I checked The fuel return fuel was full of bubbles just foam The whole time since these engines have been around I have NEVER seen this! So rolled the dice and pull the injectors had em tested! 4 would Not pop test AT ALL the guys gauge maxed out the other 2 were just slobbering fuel it was amazing the engine ran at all ! funny thing is it really didn't sound bad ! Anyway just another Shit happens occurrence Kind like your fuel pump ! Again Good find on the pump Red !

Its to bad the wheel had to squeak so long to get greased , how ever at least it got some! Good luck with the new unit when it gets here bro!

f**ksakes What a pain! So much for the flat rate hope you get paid by the hour!🙄

Another bandaid! They now lock tight and stake the nut horse is out of the barn though! Day late two dollars short!

Sorry to say but in my mind right now you got mostly a big red boat anchor under your hood from what you have said! it may not be worth repairing this ! Due to the age of the unit!

Unfortunately the dude who put the compressor on blew it big time when you got broken gears you need to go looking for why they broke! And these engines have a track record!

Yup and it was still running that’s the bad part for you yours is not 30 grand could go away in a hurry!