Thanks guys for your input. #2 injector is way out of balance. 7.7 and with the second scan about 100 miles later, freeway driving with injector cleaner in tank, it was 9.2. At idle it smells like raw diesel fuel. It all seems to be the injectors on the left bank. This makes me wonder if there is more going on than just the injectors. Are there check valves in the system to keep the pressure up to the injectors? Can anybody tell me?
In any case all the injectors will be replaced. I don't want to go through this a second time by having one fail on the right side.
Thanks. Hoiman.

 

I'm on my 3rd set, with the current set having ~70K on them. Balance extremes: +2.5 and -2.0. If you have a TechII, check the PWM on those injectors. My +2.5 shows ~0.4 msec and my -2.0 shows ~.27 msec (worst I saw was 0.21msec). This is far below the +/- 4.0 (P) and +/- 6.0 (D). Smoke comes and goes, but does smoke bluish with increasing regularity and heavy smell. Still looking for a cause. Engine has 350K, '01 LB7.

 

have you looked into command pressures or anything like that ????

if your fuel pressure is low, its gonna haze all the time as well ... no injector will solve that issue ..

 

I've got both an Edge monitor and access to a Tech II through work. Pressures are where they need to be. Changed both fuel filters and my fuel source. I run Stanadyne Performance (or, if I run out, I've got some Lucas or Power Service-silver bottle as a backup). I can try Total Power FPPF; heard it helps.

PW appears to be normal. BR on all 8 is nearly 0 +/- 0.5 after a 4 hour highway run, but a couple will drift out further after the engine cools down a bit. Sometimes I see smoke, others not so much, but the smell of unburnt fuel is in the exhaust. I can apply 1% throttle angle and defeat the auto balance program- I hear virtually no difference in the engine and if anything, the slightest loping (probably nothing to get excited about).

I'm going to try some Seafoam in a tank and see if it helps. First startup and a long run doesn't show much if any smoke. Slow driving around town and warm idle reveals more smoke. Putting off the injector swap as long as I can. Last few oil analysis samples have shown nothing in the oil (no fuel, water or coolant).

 

Sounds like there just having a low pop pressure issue then .. a swap is nearing unfortunatly ..

 

Perhaps. It is what it is. This time, however, I'm looking to do them myself as I can get the sprays cheaper than through a dealership. Downside: looking to buy a used beater car for transportation in the meantime (which appears to be a necessity, given the high miles on this truck). Still cheaper than a new DMax!

 

Trade this one in on a newer one ... thats my plan .. with my 12v truck

 

Already gave that one some thought. First, I'd have to opt for one that doesn't have all of the injector issues like those of the 2005+ (need to get closer to 2009 and up). Next, my dealership service mgr (who I've worked with exclusively for my service over the years) tells me that the newer used DMax trucks are expensive, usually high miles and are gone within days after they hit the lot. I've looked a 2014+ to see what I can get with my GM employee discount and it don't look pretty- close to $50K for a 2500HD w/DMax. Figure in higher insurance being a new vehicle and $500/mo (+) monthly payments. Eventually, yes I'll go new but hard to justify right now.

I've recently learned that I'm eligible for employee discounted prices on parts- I'll have to look into the cost of injectors from that source.

 

might be worth it to just pile in 10K and make your truck what YOU want it to be at that point .. then you will be real happy with it and no need to spend like 50 K .... unless you wanna make your truck a real monster ..