Isx wont start

[Rawze]

(01-07-2020 )Toddmsc Wrote:  ...
Started to inspect things and found feed tube loose. Re torqued, checked again. Still loose. Put torque wrench back on it spins under torque again. Odd. Checked, still loose. So I pulled it all apart. Compared to cyl 5 to make sure of same length, not crushed. Put back together had to keep torqing I'd have to say like a dozen times before tube was tight. Fired off fine. Still have 157 low fuel pressure, and some weird 639 1939 message missing between modules. Never seen that one before. I can only assume bc the tube is still bleeding off my rail pressure.

I got a tube, seal, and nut coming. Going to pull injector to make sure it's alright. If not I'll need one of those also.

I did do a high pressure pump head and the gear transfer pump as I believed to be original with 900k on them. Both had unchipped red paint..even the bolts where painted with no signs of being taken off...who knows could have been a respray after someone replaced. To me, def a wise investment I believe.

Sounds like your on the right road with it.

Be sure to also do a rail leak test before calling it good too.. Hence the urgent need to always have Insite when working on these newer engines. if it can;t pass this leak test in just this same way, it may seem to run ok, but it is still going to suffer problems...

Here is the video for a 2250/2350...




The old-school days of "it sounds and runs ok" will fool a person in a hurry. - these things are delicate flowers that need a lot of attention to detail, or they suffer in the end.

Just about every truck that shows up here, that leak-down test is one of the first things I go for if the truck owner is complaining about low fuel mileage or other fuel related, or emissions system issues on them. - these things are notorious for not passing this test after injectors or the fuel system has been worked on, and later still having problems.