Well, that explains a few things...

Power Hungry · May 14, 2012

I was finally getting around to completing my pressure testing and wouldn't you know it, I suddenly developed a dead cylinder. I'm like, "WTF? Is this really happening?" A quick DTC check showed #5 cylinder fault, so that gave me a good starting point.

I figured since I had the new injectors from Full Force sitting on the tool box, now would be as good a time as any to install the injectors. So, armed with lots of caffeine, I got the top end torn off and proceeded to swap out the injectors.

Here's what I found...

(click on image to enlarge)

(click on image to enlarge)

Any guesses as to why #5 was dead? LOL Of course, this means that my plans for pre-testing ICP & FRP with the stock injectors are now scuttled.

Fortunately, these injectors are stock nozzles so there should still be some useful data we can obtain between the ICP tests and FRP tests, but I was really hoping to see what kind of valid power gains we'd see with simple modifications to the fuel and HPO systems. All we're really left with now is validation testing for the HPODS, which will still be extremely useful.

Ah well... the best laid plans of mice and men and all that stuff.

F-250-Owner · May 14, 2012

You can just stick that back on and it will be fine.... a little jb weld..... it will be ready to rock

02POWERSTROKE7.3 · May 14, 2012

I have pulled a couple out that looked just like that. on one the nut was just loose the other was about to go down the oil drains in the head.

907DAVE · May 14, 2012

Same here. Kinda strange.

Power Hungry · May 14, 2012

Sadly, the nut was nowhere to be found. I assume it's in the oil pan now.

Ah well. Drive it until it breaks.

Extended Power · May 15, 2012

I had that happen too.
But, believe it or not, I found the nut right beside the valve spring...just waiting for me to use a pair of fine needle nose pliers to pick it out of there.

See...I have had some good luck too...lol.

Mdub707 · May 15, 2012

Red loctite is your friend on those guys...

I've heard of this more than a few times now.

faster6.0 · May 15, 2012

Ouch .. Good excuse for upgrades!

U235a4 · May 16, 2012

Power Hungry said:
Sadly, the nut was nowhere to be found. I assume it's in the oil pan now. Ah well. Drive it until it breaks.

It's funny you say this a buddy of mine was working on his truck doing injectors 6 years ago and finally 6 years later his lost torx bit got suck up into the oil pump and sent metal throught LPOS. here are some pics.