could bad injectors cause white fuel smoke at idle and still idle smooth and run okay fuel pressure overflow valve tests okay timing at 16 degrees with 20 over head gasket thanks ahead of time tony

 

injector stuck open

 

Are you running a +.020 gasket becasue of a -.020 head grind.....or to lower CR? What injectors? What washers? There are many variables that change with a timing change, as well as a gasket change. Spray angles and piston position (read injecting in the bowl). Many things can cause your symptom.....including a dribbling injector as monster said above. Solid white is raw fuel....hazy makes things a little more cloudy, excuse the pun. Let us know and fill out your sig...I see nothing?

 

Not to confuse the forum guys, but I was curious about blue smoke. If I'm not mistaken, thats oil right? Mine only does it if its pretty cold out, and not warmed up to the first line. After 300,000 I guess its expected?

 

my engine has ddp 90 horse nozzles i assume they are supposed to have the correct spray angle this engine has a new rebuild and does not use oil the engine used about a quart of oil per 1000 miles before rebuild it also had this white smoke before when the injectors were new it seemed to be okay for a short time thanks tony lewis

 

What causes white smoke?
White smoke is the result of incomplete combustion and is generally associated with engine startup
at low ambient temperatures. This condition is more predominant on high-horsepower fixedinjection-
timing engines because the fuel and combustion systems are optimized for maximum
performance and for reliability and durability under high load operating conditions. These engines
can have two or three cylinders that misfire or have incomplete combustion when the engine is
started at low ambient temperatures. The fuel that is injected into the cylinders that are misfiring is
exhausted into the atmosphere as unburned hydrocarbons which cool, condense, and appear as
white smoke. As the cylinder temperature and subsequently the coolant temperature rise, the
misfiring cylinders begin to sustain combustion which decreases the hydrocarbon level in the
exhaust, resulting in less white smoke being produced. Since white smoke is a normal
characteristic of high-horsepower heavy-duty diesel engines during start-up at low ambient
temperatures, it is extremely important to determine if the level of white smoke is significantly
higher than normal for a particular engine model before making any attempt to correct a complaint.
This can be accomplished by comparing the level of white smoke from one unit to another which
has the same chassis configuration and engine i just read this at cummins.com it might help

 

hey guys how do you fill in the sig my truck is a four door 2wd dakota engine has a 351 holset over a s-475 helix 2 camshaft o-ringed head also a duel coolmist water injection for i have know room for intercooler

 

hey tony you oughta post that question in the bomb shelter so one of the administrators have a better chance of seeing it and help you with it or go up to the right hand side at the top of the diesel bomber page and check out your user cp should take you to edit your signature