Mark22300

ok im gonna start a new thread with a complete description, pictures and hopefully some video. love the enthusiasm but this got away from me.

this is the part i replaced. and this is the air dryer. i only hear the air pissing when im speeding up and sometimes it purges and quits but other times it just keeps pissing, let go of the gas and it stops. i will try to get a video of it maybe here

i replaced my air dryer 2 or 3 months ago and nothing changed. the leaking air was happening before the derating issue, could this be a failing air compressor loosing boost? my egts have never gotten past 1000 (1000 away from the red zone) even in this derated limp mode. ive gotten a 2-2 code and this 2-4 code. normally the 2-2 is only on start up and the 2-4 is when pulling and pushing boost. never shown up together. Ive applied 30psi to the waste gate and it opens and closes fine, no air leaks in the Blatter. i did dump my air tanks for the first time in for ever and i noticed what looked like engine oil or maybe just rusty shitty water come out? makes me suspect the compressor more? ive replaced the one valve right above the intake air filter as well i cant remember what its called, kinda like the brains i was told.

forgot to mention it just started hard starting when this 4-5 code showed up, will crank and fire then die then fire up on the 2nd try.

well my injector codes and issues went away now im getting a intermittent 4-5 code and the truck wont build more then 18psi of boost when that code shows up. typically it'll come on the most when im hauling a heavy load. exactly when you need you boost lol. any ideas? i also have a valve or something that wont want to purge and will just piss air until it finally purges and goes away but i don't think its related as it never drops the air pressure on my gauges. i don't believe its the air dryer because i just replaced it but that exactly what it sounds like when it finally purges after pissing air.

im pretty sure it shot out because the retaining clip wasn't holding the piston in, ill know tomorrow when the new eup shows up. and the roller is all metal i believe

this is the d clip right?

the D clip is still on the eup, it doesn't quite hold it in i was able to make it pop past even after i reassembled it. and no the roller is completely smooth its probley the lighting making it look scratched but ill pull it out again and double check just to be sure

Well i got around to pulling the EUP and sweet baby Jesus was looking down upon me and extended a miracle, roller is in good shape cam is fine. The EUP on the other hand blew apart as you see in the photo when i popped it out of its hole, the gold plunger seems to have gotten past the retaining clip and was possibly sitting loose in the hole or maybe just not assembled properly? Im not sure if that was the cause of the issues or if that happened due to the sudden release of it being under the pressure of the spring that aloud the plunger to get past the retaining clip, there's also a wear mark in the golden coating as seen in the last photo. possibly a contributing factor to the infrequent 8-4 code. I ordered a new EUP from https://mydieselpro.com/ the guy I talked to was very helpful and was under half the price Mack wanted for one. ill toss the new one in and hopefully that fixes that.

what would that do? could it be a issue with the oil? i run shell rotella 15w-40 at the moment

well i got the oil sample back and there is no metal particulates or any sign of the cam/roller being damaged. code hasn't came back since i cleaned the connection's until this morning when i started it up it coughed a bit and started shitty then it threw the code at me again. shut it down and checked the blink code fired it back up and it was gone again. thinking its the eup itself that needs replacing

also i had a buddy whos better at computers then me find me the manual pdf online 👍

ok so i got the chance to clean up the connection's on #4s eup. As you can see they where pretty shitty and corroded. i hit them with a wire brush and brake cleaned them then reconnected and fired it up and i let it idle at 650rpm (low idle) for a good 15-20 mins and i didn't hear or feel the miss. i cranked it up to 1000rmp for another 10 mins and still nothing, idled just fine with no miss. Im really hoping that this was the problem. Im going to drop the oil and see if i can send my inspection camera into the drain hole to inspect the cam for damage as a precautionary measure, otherwise ill drop the pan as you advised. i also sent a oil sample away to check for metal shavings and it should be back early next week. ill update when i know more Thanks for the insight and help with my issue here guys i really appreciate it.

thanks for the image I really hope this isn't the case for my situation or i am completely F-ed as idk if id be able to afford the fix.

This is the alignment dowel correct? there is a allen head plug right beside it. any one know what service manual i need for this engine (2002 E7 460P)? id love to have some break downs and repair guides for it