Wanted to start off by saying thank you guys very much for helping me out with my last truck issue. The last early 6.0 issue i had with another truck ended up being the pump as you all said. It took four reman pumps to get a good one so anyone reading this i highly recommend going with an adrenaline pump so you only have to do it once! So thanks again. So i had another customer bring me another early 6.0 build f 350. This one too was a driving down the road and it just died, this truck had been at another local shop for a few weeks and in that time they replaced the high pressure oil pump and the ipr, put it back together and it wouldnt start. they finally gave up on it and sent it to me. I watched numbers while cranking, everything looked fine so i pulled the ipr and changed it out with a known good one and it fired right up. I put my foot right into it to bring it up to 3,000 rpms to purge air out of the HPO System however the most it would do was 2,000 rpms. It held that for about a minute or so before it started dying off and finally just died altogether. Cranked it again, it fired right up, but died. Went to try it again and the bugger hydro locked. Checked the engine over quick and saw fuel dripping out of the passenger side valve cover, pulled it, pulled the first glow plug on that side and cranked and it turned over. Put the glow plug back in and fired it back up. Raw fuel is being pushed out between the second and third injector somewhere by the looks of it. I cant tell exactly because i dont have another person to crank it while i watch but from what i can see everytime it turns over high pressure fuel is being pushed out. I pulled the first two injectors on that side and they seem okay, i changed them out with two other injectors i had sitting on the shelf just to see and it has the same issue. Is this a bad injector, a bad injector o ring or something internal to the head? should i re-oring all the injectors on that side? Upper and lower? Never heard or seen this before but definitely high pressure fuel as it blew a stream acrossed my shop. and it fired up and ran that way. Scary deal. As always any and all help is much appreciated. Thanks everybody!

 

Did you clean the bore cups good before putting the others back in?
How good were the orings on replacement injectors?

Could be cracked head or bore cup possibly.
Have you done a bubble test?

 

I didnt initally pull any of these injectors, im thinking the other shop did when they initially tested for the HPO oil leak. I have only pulled the front two injectors as pulling the first glow plug on that side free'd up the hydro lock. Can an injector issue farther back be freed up by pulling the first glow plug? and should i pull all the injectors and re oring them? im not sure how good the o rings were on the replacement injectors, ive used them in other trucks for tests so they might need redoing anyway and i also dont know if the other shop cleaned out the bore cups when they initially pulled the injectors either, would dirt in there cause this issue? and whats a good way to clean them out? just a rag down there or something else? Thank you for help again ofcourse lol.

 

Replace Orings on all that side and Holddown on the hydrolocked cylinder then turn key to KOEO Just let only fuel pump run see if its still pushing fuel out in valve cover use flashlight


then you can rule that out


you may find it needs a head

 

And be careful that crap shoot out the GP hole at lethal Force when you clear the cylinder

 

alrighty, i will pull all four injectors, re-oring them and key on with just fuel pump and see what happens. Is a rag in and out of the bore cup a few times enough to clean it out before injector re-installation?

 

besides a cracked bore cup, what happens in the head that could also allow this to happen?

 

bad inject will fill cylinder and hydrolock too


If its all together you can do bubble test but if its hydrolocking avoid running it you know the cylinder that hydrolocked so Id do the bubble test after repairs are made to insure problem solved

 

sorry I jumped the gun


a bad head usually produces fuel in coolant


your head maybe ok

 

COMPRESSION/INJECTOR BUBBLE TEST



just in case


THERE ARE 2 COILS IN EACH INJECTOR
1. OPEN COIL WHAT HAS + AND - WIRES
2. CLOSE COIL WHAT HAS + AND - WIRES
OHM EACH COIL (+ AND -) IF GOOD SHOULD SEE 4 OHMS OR LESS
AND SHOULD BE OPEN TO EACH OTHER




the injector tip should be able to hold vac pressure too hook a vac pump to it this gives only general idea of condition

 

thank you guys very much, i jumped the gun i suppose. Couldnt take just leaving it for the night so i went back to the shop, started pulling injectors and before i got to the third one i could see half an o ring chewed up in a valve spring. sure enough, i pulled the injector and the fuel o ring was gone all together, blown in half and laying there. I changed the injector out with one i had previously taken out and the raw fuel issue is entirely gone. However, before doing anything, i did pull all of the injectors on the passenger side bank, cleaned out all the bore cups, reinstalled the injectors, and did kick the key on engine off to watch to see if any fuel accumulated up, immediatley i noticed that that injector i had replaced did not do its internal spool test after the key on, tried another key off key back on to hear the injectors do their test, and again it did not. so i grabbed another injector and plugged it into the connector just to do the test and that injector did not do its test either. So now i guess i have no power coming out of that connector, im not sure if its because its soaked in diesel fuel at this point or if it has a pin issue internal to the connector. Tomorrow i will get my fluke meter out and do some tests but i didnt wanna miss walking dead tonight so i plugged everything back in, fired it up and backed it out, it runs fine except for that cylinder so to be continued tomorrow.

 

noid light might help


mchane posted a pic at one time

 

Be sure to check the loom for chaffing, etc all the way back to the FICM.

 

Just in case


FICM PLUG PINOUTS DIAGRAM
https://www.ford-trucks.com/forums/1...l#post11468913