Ok... i have a 2001 5.9, pretty much stock other than five inch stainless exhaust with a seven inch tip and an edge juice with attitude CTS, and a stock auto trans with shift kit, (built trans coming soon). I bought the truck in December 2011 with 103xxx miles. I added the CTS in late april with roughly 113xxx miles. I have loved the programmer since the very start, and still do. The truck never smoked without the cts, and it smoked black incrementally with each power level (quite a decent amount for stock injectors on level 5). I generally ran it on level 1 and would turn it up to five whenever i was feeling froggy. The sunday night before memorials day i ran it all night (10 hours) on level five and i was getting on it all night, i mean really diving it hard. Well last Friday i noticed that it started smoking more of a gray color at times, but it would still smoke black more often than not. Well now on each power level it smokes black at the start of the low boost smoke, and turns gray as i build boost, and eventually turns white. It still smokes mostly white at level five when i'm getting on it pretty well. I could be wrong, but to my knowledge the white/gray smoke is either from a lean condition or coolant. Today i checked my coolant and it hasn't dropped a bit so i do not think i blew a head gasket. I am running a completely stock fuel system. The only lift pump psi gauge i have is the one on the cts which i monitor constantly. At idle it is only at 9 psi and during light acceleration it is at 4-6 psi and during full throttle conditions it is at 0 psi. I didn't think that this was quite accurate because it runs perfect no matter the throttle position. I have changed the fuel filter not long after installing the cts, and it didn't seem to change anything. I was looking for some insight as to what may be causing the white to gray smoke. By running the cts on five with the stock lift pump do you think i damaged my injection pump, or do i have an injector going bad? I plan on buying an air dog 150 gpm lift pump soon, do you think my cts will read higher psi? and do you think that may fix the white/gray smoke?

 

I bet that's pretty much right on... slowly smoking your injection pump. Scan it for codes.

 

Are the PSI readings you gave me off of a cts or a manual gauge? i just scanned for codes and had none, im not disputing your diagnosis, but if my vp44 was having some serious problems wouldnt i set some misfire or lean codes? and wouldnt i notice some driveability issues? im sure it is my vp44 running out of fuel, i cant think of any other problems that may be causing this symptom. i just sold my car and i plan on using the money for a trans and a lift pump, do you think when i put an air dog 150 on that i may notice the white/gray smoke go away or is that too much to wish for? and do you think i should be fine running the cts on level 1 if i drive it very nicely for a bit until i install the air dog?

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im sorry im new here i realize now that you didnt give me psi readings those were mine ... disregard that part

 

Your vp could already be smoked at this point, not all vp problems throw codes

 

What do you suggest for diagnosis?

 

Could be a bad injector, what did you scan codes with? Do the airdog either way, you're going to need it irregardless of what this issue is but I'd be surprised if it fixed it for you. Def leave the juice on level 1 because even 9psi @ idle would make me cringe if that were my truck.

 

ok well thanks everyone, i will update when i figure something out. but once again does anybody have any suggestions as far as diagnosis goes?