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Typical Injector Problem... But Injectors are Fine

2083 Views 15 Replies 7 Participants Last post by  Chupacobra
First of awesome site and I'v used it numerous times to enducate myself about diesels. My name is Omar and i have a 2004 (2003 engine) 6.0 with 180k, stock tune and absolutly love this truck!!

Ok so heres the deal.. The truck had a slight miss at idle on cold starts. once it warmed up in 10 min she'll be just fine. One day i notice she lost all power and wasent thr same truck anymore also some times at WOT she'll smoke white.. well i keep on driving and knew its time to pull the injectors. so about a week ago i turn her on, let her idle for about 8-10 min's like every day, head out the drive way and as soon as i give her some throttle she's somkin' like a train (except its white lol). turn around, park her and take the cobra to work :(

When i get home from work i pull the injectors and send them to a buddy. he tested them at diffrent temps, spool valve speeds, ect ect ect and they all came back fine.. soooo im kinda lost.. no idea what it could be :(

i tested the FICM before hand and it tested out at 48v where is should be.. any advice will be helpful as this is my very first diesel truck i ever worked on
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really? why would it smoke white if the pump was bad, i understand it will have a loss of power but dont get the smoking part..
if the fuel pressure is lower than it should be then it will smoke white. white smoke means either not enough fuel is getting into the cylinders or it can be steam from a failing egr cooler. any coolant loss?
the burning of diesel fuel in an engine is a complicated chemical process but here is the short version. white smoke means that there is raw fuel entering the exhaust. this can be caused by low fuel pressure because there is not enough fuel in the cylinders to produce complete combustion so some remaining fuel enters the exhaust and burns off (white smoke).low compression can also cause white smoke for the same reason. i know this sounds backwards. basically in a diesel engine black smoke means too much fuel and white means not enough. could also be coolant but if you are not using enough to notice then thats probably not your problem
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