12V_shooter25

Ever since I got the truck, I have noticed that at idle there is always a light haze. At first, I just thought it was because the truck had a Scheid-built pump on it and was just over fueling , so I wasn't too concerned. But after about a month, I took a closer look when the haze hit the sun just right. To me, it looked white with a very tiny hint of blue. Now I'm just plain concerned.

I did my research on injection pump tuning, hoping that I could just adjust the smoke screw and see if that helped (just in case my eyes were deceiving me). Today, I turned the screw 1 1/4 turns counterclockwise (in 1/4 turn increments) and had no luck, it's still there, just as much as it was before. I believe it's burning oil since i lose about a quart every 3,000 mile oil change. My rear main leaks a tad bit and so does the oil pan but they only lose a few drops every couple weeks.

I would just like someone with more expertise on the matter to chime in as to what I need to do. Possible injector issue? Pump over fueling? Burning oil? Any response it greatly appreciated!

jimbo486

When do you notice it mostly, after a cold-start? Does it go away as the engine temperature rises?

White smoke tends to be from unburnt fuel in low combustion chamber temperatures. Blue smoke tends to be from burning oil, of course. Typically from a turbo seal on the turbine side but can also be on the compressor side. Thus, blowing oil into the intake. It could also be valve seals.

12V_shooter25

It seems to do it just about any time. Another thing to add is that, at night, I can see low smoke haze in driver's headlights who are following me. I don't mean when I'm accelerating, I mean at idle. It's not leaking on the compressor side because I had the intake off here about 2 weeks ago and I didn't see any oil. I painted the turbo here a month or so ago and didn't notice any oil on the exhaust turbine either. Temperature doesn't really seem to effect it other than the usual cold-morning start.

ChrisLib

I can add that injectors with the wrong angle will also produce a white/blueish haze. My truck was haze/smoke free until I put a set of PODs in it, then swapped the PODS for another set of sticks with a worse angle and until I tuned on the pump some more the newer sticks blue smoked more than the PODS. I`m not saying your NOT burning oil, its just that having an engine that burns basically a light oil for fuel can confuse the commonly held reasons for blue smoke. You could try fiddling with the timing, thats where I found most of my reduction in haze...I couldnt tell you where its set degrees wise as I tuned it for the least amount of smoke/haze VS. low power driveability.

whereswaldo250

OK, thank you for asking this question because this is the exact same problem I am having (thread 190's Haze). I cannot seem to figure out what that problem is and what my next steps are. I weird to think that when you buy a set of injectors some are the wrong spray angle. Even the lightest amount of throttle cold or warm it hazes, is this the same experience you are having?

Jim5870

I have this trouble also, I notice that when you idle in neutral it will clear up
about 50%

12V_shooter25

Mine hazes about all the time. Going down the road during the day, I can't see it at all. I can only see it during the day at a stop if I'm looking from outside the truck. But at night I can see it clearly in the following driver's headlights. I have no idea what injectors are in the truck.

I recently found out (about 2 months ago) that my truck was originally non-IC. When installing an AC compressor, the truck's AC lines and installed compressor were a C-171, which is for the non-IC trucks. So I'm assuming a previous owner of the truck did a factory-style intercooler once they become available.

Therefore, I'm guessing the truck has 9mm injectors but I don't know the spray angle. I know it has to be either 145* or 155* but from there on, I'm clueless.

jimbo486

Non i/c have 155deg. spray angle. If they haven't been changed, the factory size is 4x.012s.

whereswaldo250

What is the factory size for I/C trucks, and spray angle?

1972RedNeck

I have the same problem the OP has. I just drive it. I never uses any oil. I'd like to see a solution though.