Too much black smoke

[foresterdj]

Since my recent work, installing Baby Moose and BB injectors, I have only made short 10-20 mile trips. Back and forth to town, over the North Hill as a test, etc., and truck has been running great, power, responce, a little black smoke if I really stomp on it, but driving easy no visible exhaust smoke. Timing was meter set at 8.9* BTDC. I run only straight diesel with addative.

Then Friday I took off for a longer trip and the truck would blow intense long duration heavy black smoke under almost any acceleration. If I backed off to the point that the smoke stopped, I would loose speed, and under any load (truck basically empty) black just shot out of the exhaust. I have changed nothing since previous runs, so this behavior is a complete surprise, I turned it for home after about 15 miles and took the car.

RPM and speed relations were not any different. Truck was shifting at its normal RPMs.
Exhaust temps were higher than normal, pushing 1000* -1050* even in third (OD off) going up North Hill, when in third on test runs I stayed more like 900* holding 60-65 mph
At idle, idle RPM and sound seem normal, and no smoke at idle
Significant lack of responsiveness to added throttle, instead of a brief smoke and away-you-go, it was more like a long drawn out acceleration, blowing smoke like a frieght train.

My only thought is that engine is suddenly starved for air, so tomorrow after work I will check air cleaner and intake to see if a darn mouse or something decided to build a nest there. Other than that, I am wide open for suggestions on what to check

 

[itsacrazyasian]

you're on the right track. diesel engines need lots of air to burn all that fuel.

 

[CaptTom]

After air restriction:

I know they're new, but stuck injector whizzing?

Do the temp method, hot injector is open injector and the bad one.

Obviously more fuel than air ratio, however whizzers won't completely burn either.

Somehow, major loss of timing would be my next guess. Did the timing nuts get tightened real good?

 

[GOOSE]

I would definitely rule out the basics, compromised intake and timing are easy targets. Hopefully the air cleaner sucked a rag or something simple like that. No matter what, you have good backing with the Moose Pump, I am sure the solution will be found. Good luck, keep us posted.

 

[icanfixall]

My feeling are an air restriction of some kind. If you can't see sunlite thru an air filter its dirty and needs cleaning or replacement.

 

[foresterdj]

Been busy with forest fires the last week, so just finally had a chance to look at truck issues.

Intake tube is clear
air cleaner a little dirty, went ahead and installed a new one.
timing has not shifted since I timed it with meter and scribed new mark

test drive - same. Driven easy = no smoke
idle = no smoke and sounds fine to me
shifting still seems normal
no changes to engine oil levels

Probably will shoot a PM to Mel for suggestions.

 

[foresterdj]

Learning to drive easy on the throttle and can get around on the flats (~4000' elev.) without too much smoke. Still smokes pretty good, and exhaust temps get too high, if I try to pull hill on cruise. See video from todays test run. Timing was meter set at 8.9* BTDC and has not shifted.
http://youtu.be/GR-iLSiUNMM

 

[xcite]

If you are running at elavations with no turbo sounds more like you need to turn the pump down slightly.

 

[OLDBULL8]

I had the hood insulation suck in my air intake, black black smoke. Couldn't figure it out finally a piece stayed there.

Edit: Forget it, thought you had a turbo.

 

[justinray]

Rules for increasing power in a diesel.

1. More Air In
2. More Air Out
3. More Air In
4. More Air Out
5. More Air In
6. More Air Out
7. More Fuel
8. Repeat

I think you missed 1-7.

 

[GOOSE]

That video didn't look all that bad to me. I would say turn the fuel down maybe a "flat", 1/6 of a turn and see how you like it. Of course, a turbo would be your new best friend, especially in the elevations you are running.

 

[FORDF250HDXLT]

video looks horrid to me.EGT's far too high.fuel screw turned up far too much.
economy and performance both suffer rolling that much coal.
id back her down 2 flats at least for starters.you can always turn her back up a 1/4 to a 1/2 flat if it's needed.

 

[icanfixall]

Talk to Mel before you adjust the fuel screw in the pump.

 

[foresterdj]

I have a PM to Mel, with the video, so he can evaluate and recommend any settings I might want to adjust for this elevation.

 

[Agnem]

We've exchanged PM's. My first preference would be to see what slightly retarded timing might do for him. My Moose Products are all calibrated at sea level, so this continuous operation at high altitude is producing expected results. Frankly, I'm surprised it runs as well as it does! A turbo would really make a world of difference, especially for the high altitude guys.