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 **** 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!

 

re check your fuel lines. maybe getting air into the fuel.

 

Sorry about your situation, but this is why I won't modify my engine.

Rough idle can also be attributed to overfueling. I would suspect this is what happened to yours. Try running it stock again and see what happens. Good luck.

 

I'm not so much worried about the idle, because wether its air in the lines, bad pop off on the injectors, or over fueling... those can be fixed easily... its the pouring white smoke and knock I'worried about.


I did check my fuel lines and nothing was loose and no leaking fuel that I can see.

 

why won't you modify your engine?

 

I crack eached injector line and each cylinder is getting fuel and no air in either.


Think its the headgasket or what? Could the change in the injectors cause a headgasket failure?

 

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?

 

It was not designed to be run past the factory specifications.

I'm concerned with long life and fuel economy, not power output.

 

Possible headgasket - although that's likely a later onset failure - the pouring white smoke indicates presence of water or coolant in the cylinders.

Can you describe the knock more - is it in the deeper (cylinder block skirt) in the engine or toward the upper end? It could be something as simple as a vavle tappet, or a failing main bearing, or a scuffed cylinder.

 

Sounds like its up top to me.

 

He didn't ask for your opinion just some help, please stay on topic.

Reinstall your old injectors and see if it come back to normal. Did you install the tips or complete injectors?
By cracking each injectors one at a time did the stumble go away at all. Could be a broken injector tip or stuck open injector.

How's the oil level, coolant? Is the fuel tank pressurizing? Had a fellow chapter member not tighten down one of the injector hold downs and it was pressurizing the tank.

 

Well, my dad knows the local Dodge dealers diesel mech pretty well and he told him my situation and hes stopping by tonight to take a look at it.


Oil level is good, coolant is low... but was low before this. By low I mean below the full mark... not below the add mark. Not sure if the tank is pressurizing... haven't check to see if the tank is pressurizing.


When I cracked the injector lines the stumble didn't go away it made it worse... or I atleast could tell that air was getting in.

 

what if you had an automatic truck rated at 180hp and you wanted to upgraded it to 215hp?

you realize that some mild modifications will increase fuel economy, right? OEM's do not set up engines for economy... they set them up to appease the EPA

 

White smoke is unburnt fuel, could be a hung injector. Put your stock injectors back and see what happens.

 

Mine always has a pretty good white haze when I first start it up. Did you notice if the tach was acting up. Mine had a rough/lopey idle and was due to a screwed up crankshaft position sensor. Mine would start acting up after about 10 miles or so.