Branch Tube??? - Ford Powerstroke Diesel Forum
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Old 01-22-2013, 09:32 AM
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Branch Tube???

06 250....about a year ago was merging onto interstate and heard a loud pop, next I know my truck is sitting on the side of the road with oil pouring out. Was a STC catastrophic failure, busted rear cover and cost me 3 months without my truck. I replaced rear cover, got new STC fitting update and the branch tube was canted to the rear, bent it back slowly/carefully, I did an air test and found no leaks and ended up with about a 1/4 qt of oil in my face when i released the air from the branch tube adapter. Now... this past thursday got up and went duck hunting, cranked right up as usual, pulled the boat to landing without issue, got the boat out and noticed a long "skipping" type of start, but it did start within 10 secs. Got the boat home and dropped it then pulled around front to change clothes, went out and attempted to go to breakfast...well it was a crank no start. of course i checked the oil level, fuel level and all the dumb Sh** but nothing. I have the SCT iTSX and checked my FICM not lower than 47.5, I attempted to check HPO press but its in MPA and confused me....Don't know where to start. just changed oil several weeks ago..and was having long starts but attributed it to i went a little over on mileage between oil changes.. sprayed just a squirt of either/starting fluid in airbox to turbo tube and she started for just a sec, then shut down....does anybody have any ideas? I'm leaning towards a leaking branch tube, how might I go about changing it? I know the tranny, rear cover and all the crap off the top have to come out/off but how do you get the tube out??? and can I just unbolt the rear cover and rotate it down so I don't have to invest in that rediculous pulling tool for the rear seal then another crazy amount for the installer?
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Old 01-31-2013, 06:16 AM
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just an update...disconnected the ICP and attempted to start, no start. I had an idea and I don't know why it hit me...I plugged the ICP back in and began cranking the motor again. Now i noticed that the Injection Control Pressure began to climb and I held the pedal to the floor. It sparked up but shut down before even "starting" did this again and when the motor wasn't turning over the pressure was 0, turned it over a few more times and after about 3, 10 second cranks it started but hesitantly....anyone think maybe it's still a HPO leak?

Also, since it was running I left the comp on it and drove it to my shop thats about 4 miles away. Pressures droped down to 3.4 mPA(450 psi) and just pulling out of the driveway not under any extreme stress pressures hit 23mPA(3300 psi)
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