Engine Knock and Pouring White Smoke!

CumminsPOWER

CumminsPOWER

"I'll go all in."
Joined
Sep 3, 2007
Messages
791
Okay guys... need help, advice, knowledge something fierce! Installed jammer 5s saturday night. Everything went rather smooth, no real troubles worth mentioning. Started her up, idled rough... then smoothed out after the air was out. Took her for a test drive everything went smooth, nothing out of the ordinary... except that excessive black smoke when I'd romp on it. Anyways, didn't drive it sunday except for a quick jont around the block, almost died in the drive way when I put it in reverse but recovered... didn't completely feel right while driving it but didn't seem extrodinarly wierd. Jump in the truck about an hour ago to head for work. Starts up fine, idled fine, ran fine... until about 15 minutes into my drive I let of the go pedal to come to a stop. Idled lopey and rough... like it did when we first started it up after the injectors. It damn near died on me. Thought maybe thats how the jammer 5s were after letting of the throttle like that, so I continue to work about another 10 minutes. Get into the parking lot and the rough/lopey idle is still there but this time with some sort of engine knock or ping. Sat in the lot for a few minutes to see if it came out of it. It didn't, rough/lopey idle the entire time. So I head for home... figure switch out the jammers until I have more time to deal with this. Rough/lopey idle at every stop on the way home. Get home and shut her down start talking to my buddy about it... realise I have to move the truck over a bit so he can put his project truck in... get in start her up right away, but she stumbles a bit and the knock comes back along with white smoke POURING out... quickly shut her down... thought maybe the turbo finally went, been having oil on the inlet side of the turbo, so I check that and it look relatively normal. I haven't yet started to dig into it other then that yet but hoping someone on here can help me out.

Any ideas as to whats going on? What I may have done wrong? Help would be GREATLY appreciated!
 
When you say installed nozzles I assume you swapped nozzles only. Did you have them pop tested.
Or was this a complete injector swap?
 
They were complete injectors, but believe they were just nozzles. They were used, can't remember if 2141pete said they had been pop tested. Would they weren't fueling in sync, wouldn't that be the cause of the rough/lopey idle only? Or would that cause the white smoke as well? I checked the fuel lines and they are nice and tight. No fuel leaks that I can see.
 
Are you SURE that you got them all cinched down good?(injector hold downs I mean)
It will run a little rough if they are leaky,wild guess on my part.
 
The oil wasn't milky in color at all, but I do believe there was some coolant in the oil because when I was doing the install I forgot to place the heater hose back on the fitting and accidently rested my arm on the radiator hose and the coolant came shooting out of that fitting. I thought for sure it all ended up away from the head b/c the exhuast manifold was soaked. I tried to see if any had gotten in the head. Still, I don't think that it was enough to make it smoke this much.



Injector hold downs are good and tight.
 
Crack each injector line one at a time and see if the truck changes in sound. If it does then you know that cylinder is running. If you crack one and see no difference, then you have an issue with that cylinder, swap injectors with one that appears to be ok. If the problem doesn't follow the injector then you have an issue with that cylinder(pump, headgasket, valve, etc)
 
I'll try that... I suppose work my way from the #6 injector line forward before the motor gets too hot.:aiwebs_016:
 
Finally got a hold of Cummins Central Power... they said that it sounds like the white smoke is from low compression. The fuel isn't being burnt properly... my question is what would cause the low compression? And why wouldn't it show up right away?
 
If your truck ran fine before injector change put the stock injectors back in, send the others in to be checked and poped.
 
Yeah, the mechanic for the local dodge dealer put his diagnostic tool on, no codes that would lead to anything... He as well said the white smoke is a timing issue. The fuel is coming in too early and the cylinder(s) aren't hot enough to burn it completely. The sucky thing about it is that while he was there the truck ran great and no smoke.... after he left I took it around the block and white smoke.... not as much as before and the rough/idle wasn't there.


If its the injectors, can they be fixed or what? Because I didn't buy them new... so if they can't be fixed then I'm kinda screwed.
 
They usually can be fixed. It's a good idea to have any used injector checked out before install.
 
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