I finally have time to tear into my 05' from a possible fuel leak. I am not down to the injectors yet but we can turn the engine over fairly easy with a breakover bar. We turned it over a lil over 2 rotations. Now when it was parked it was smoking but running fine, then it started making a knocking noise which from what I was told was an overfuel knock or bad injector. I had tried to crank it afterwards and it just made a thud and wouldnt do anything so was told it was hydrolocked. I did not have time to do anything with it at the time but am now in the process. I am going to test the ficm but when I put the key in all the guages go haywire and there is alot of clicking in the dash. I am hoping just from the batteries which will be charging over night. Do you guys think it will be ok to try and crank it since we could turn it over by hand or would it just rehydrolock when the fuel pump comes on if an injector tip is cracked or not seated properly? I am not throwing any codes or engine light. I dont have a scanner other than just a code reader which I know wont really tell me alot but we were going to just start pulling injectors and seeing if some arent seated or tips jacked up. We saw a vid on how to test the tips. Thanks for any input. It is a 05' 6.0 F250 4X4 if that helps.

 

if it did hydro lock and then sat for awhile all the fuel went to the crank case

hows the upper fuel bowel full of fuel or empty??

If upper fuel bowel is empty its leaking somewhere and Id start to track down the leak
might could pull glow plugs and do a mist test

hows the oil and coolant levals??

be very careful a injector stuck on will burn the piston up and possibly blow the headgasket

 

crankin it may also bend a rod if it locks again!! it is defanatly an injector issue!! a piston in one of the injectors has been galded and siezed, this can be caused by numerous things they say the most common is lack of fuel preasure!! i watched my mechanic perform a test today on mine he called it the bubble test.. there are two fuel lines coming out of the bottem of the fuel filter one goes to the driver side the other to the passenger side!! he cut the fingers out of a surgical glove and zip tied one on each line after removing the lines once finger tips of gloves were zipp tied on he had me crank it and it only took a second and he said the problem was on the passenger side!! he cranked it so i could see and the bad side started breathing in and out like a lung, thats why he called it the bubble test!! he said this test would eliminate one side if there were no issues there!! hope that helps a little!!

 

There is no fuel in the fuel filter housing(the one under the hood). The coolant looks good and the oil was just changed right before all this happened. There is no coolant or anything in the oil best we could tell. Was going to test the ficm but it needs to be running for one of the tests and we were wondering if trying to crank it would hurt since it was no longer locked.

 

thats not good sounds like an bad injector thats stuck on

its going to fill fast 50-60 psi fuel pressure
a ballon test like op mentioned will narrow to one sidde
a mist test might dial in what one is bad but you gotta pull GP too

change the oil after you figure what injector it is its fuel deluted

 

We saw a vid showing how to get to the injectors which didnt look to complicated. Now getting to the glowplugs requires a few more steps I assume? So I take it that cranking it is a no no or the cylinder will just fill up again and possibly bend a rod? I guess its a good sign that we can turn it over easily by hand though? I hope there is not any piston damage and that is just a simple injector change. The mist test is basically just seeing which port or cylinder sprays fuel? Thanks again for all the help.

 

We tried turning it over without the fuel pump fuse in to see how it would turn over with the starter. It would crank easily but we didnt let it actually start. We then put the fuse to the fuel pump in and cranked it again, it cranked fine for a few seconds and then made a noise like it locked again, so we stopped. I dont think anything is bent I think it just took it a few seconds to fill up with fuel before locking again. I would not let it run like that we were just checking how it would turn over. Now to drain the fuel, I know pulling glowplugs would allow this but would also removing the fuel pump fuse and taking the lid off the fuel filter so that the excess fuel would just travel up and expel that way? I know that it would not pin point which cylinder was filled but wouldnt that be a way to expel the fuel?

 

yes it fills very fast
I wouldnt do that anymore till you get the GP out

if you pull the Glow plugs and then crank you should be able to dial in the bad injector
as it should have a Heavy Mist coming out the GP hole

do the mist test first before yopu pull injectors put back in the fuel pump fuse

BE VERY CAREFUL fuel will come out at a high pressure out the GP hole

 

Hopefuly it didnt blow an injector tip off thats worst case
those tips really tear up the moter

probably just stuck on

after you get it figured out throw in that updated fuel pressure spring it helps the injexctor last longer

 

What are the causes of a stuck injector? It had ran low on fuel but not out and it started running rough. Refueled and ran fine except it had started blowing smoke from the exhaust. It wasnt alot but enough to look bad and it had a strong fuel smell. Changed oil (which was not due but was having some hard start issues at times and went from 15w40 to 10w30 for a trial) and took it for a test run, went a few miles and it started running rough and making a knocking sound. Pulled it in the yard and let it idle which was rough but the engine was not trying to stall or anything. Killed it and got on here to investigate. Was gonna do a video of how it was sounding/running and when I went to crank it it started to turn over then stopped. Was told it was hydrolocked due to a blown injector and it was overfueling causing the knock. Did not have the time to do anything with it and now giving it a shot to see what all is involved. Thanks.

 

Running below 45 psi fuel press. kills these injectors. While fixing the problem I strongly recommend doing the blue spring fuel press. regulator upgrade. That is 45 psi under wot.

 

you probably had an injector on the verg of dieing and low fuel press finished it off that would be the best thing cuz if it blew the tip off theres gona be some carnage in there




Did you pull the GPs and try a mist test to single out what injector

some diagnostic equipment like an AE would be the ticket

 

Its gonna be tomorrow before we can pull gp's. We had something come up and had to put the truck on hold for the rest of the day but ill post the results as soon as I find something out. I sure hope that its not the tip. I dont know what all kind of damage it can do but we could turn the engine over by hand fairly easy and it would spin over easily when the fuel pump fuse was out. Im hoping for the best. The good thing is we arent on foot with the truck down. Thanks.

 

due to the series of events and almost runnig out of feul probably just an injector with a seized plunger or something

could try that ballon test to narrow down what bank and then pull those 4 GPs and do the mist test

 

We are going to do the balloon test today. We are breaking for lunch but we did check to make sure the fuel was evacuated from the cylinders before we tried cranking it again this morning. Here is a video of us cranking it before we start doing the balloon test. We are fixing to disconnect the fuel lines and try to run down the bad injectors. Thanks for the input.Ford 6.0 Hydrolock - YouTube