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i posted a thread a few days ago about my injectors and transmission, but this will be about an issue, that i think is related..anywho....my truck seems to be having a hit or miss, and seems very unstable..kinda hard to describe but just seems rough and not smooth while taking off and kinda laggy on the get up and go.. kinda like its missing and its rough, is this an injector issue or something else....also i was cruisin the highway today around 70-75mph with 4.10 gears and i got home 250 mile trip and i got oil everywhere underneath seems to be coming from the blowby tube....i havent actually "measured" the blowby but now it concerns me that its puking up some oil...but its never really did it when cruisn around 60-65, as soon as the rpms are over 2200ish it pukes oil....what gives....bad rings...or something...i have no clue...help!, thanks, oh and the overflow valve was just replaced..fyi
we have a saying "KISS"... as some here might know! "Keep It Simple Stupid". when in doubt i say that to myself hahahaha. start with the easiest stuff to fix that might be a possibility and go from there.
youd probably have a knock if it were the rings... and a pretty good knock at that.not saying its not possible, but we'll say hopefully its not that!
pull those injectors and have em pop tested and cleaned while youre at it if you think its that. but first off start by turning the truck on and moving to look at the engine while still running. get a long poly handled flathead screwdriver and stick it to you ear and to each valve cover and the corresponding part of the head individually... hold that screwdriver tight and listen for the cyl. that makes a different sound. then do it all over at a higher rpm range where it seems to be missing.
An oil analysis may be the cheapest way to narrow things down. They test for coolant and fuel in the oil.
If you have a Cummins dealer near you their charge for analysis is quite reasonable.
My local dealer only charges $8 per sample and they provide the bottle.
'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Stock for one day
anything coming out of the dipstick??? possible the rings if it is running that bad with now power but be sure to check the blowby ...i might know what it is need more info before i tell you
it has decent power, im hitting 40psi boost with just a fuel plate, its just not as good as it should be which i really think are my injectors, i realy wanna get some ddp4's, but there is "smoke" coming out of the dipstick, no oil tho, and smoke as well out of the blowby tube, and once i shut it off a few drips of oil is on the pavement below, but like i said in my first post going over that certain rpms its like shooting oil out or something...i wish somebody could guide me in pulling the entire motor and rebuilding and sealing up leaks and really giving it a good tweaking and building more power, but i dont have time for that now..l.
sounds like there is a bit of a blow by problem here... Smoke out the dipstick is not exactly a good sign. So as you building boost you seem to puke more oil??? Still pointing to blow by...
I would start with checking the amount of blow-by first thing. Being blow by is a issue and smell of fuel present you might consider changing the oil out...
well its not neccesarily as i build boost but maybe it is it just seems at a higher rpms its doing that even when the boost level is fairly normal...but im not 100% sure if its entirely coming out of the blowby tube cause there are oil leaks but i didnt think they were that bad....but i guess my next question is the only way to correct blow by rebuilding the entire motor....and if so approximately how much does that cost...being that its done by a good honest named diesel shop in my area
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