Old 2.2 L motor with alot of black smoke Fix now posted

[trains]

Hi chaps.

Mate bought an 83 L 2.2 diesel a while ago.

Blew alot of black smoke on acceleration, decided to get the injectors done when we did the cam belt, seals, hubs, etc etc etc.
Replaced the injector pump top seal as the throttle shaft was leaking. Had everything marked etc.

When it was put back together, its still blowing alot of black smoke on high throttle.
I tried resetting the max throttle stop, as someone had altered it before, as too with the mixture screw.

when on higher rpm med throttle, its clean as a whistle, but as soon as you give it more throttle its like a destroyer laying a smoke screen.

On the weekend we did the border track, I noticed it was leaking diesel from the top of the pump, turns out it was the o ring in the mixture screw.
I decided to look at the runnnig on problem, which turned out to be a missing spring in the fuel stop solenoid. Took a pen apart, and cut spring to length, and its stopping perfectly now. Anyway, when the solenoid was out, I noticed that there was not any metal pieces in the magnet area, as this is where they seem to pick up worn parts of the pump due to the magnetic action of the piston, and solenoid. It was also without a filter screen, Does anyone know if these came out with a filter screen there like the later ones? the manual dosent cover this unfortunately.

Anyway, I tried moving the "mixture" screw in, and out, which made no difference to the black smoke.

So I wonder.

Were the injectors done properly in the first place??

or do we have a worn pump??

Any advice would be much appreciated.

Upon advice, I will remove the injectors, and take them to a place I know and trust, and get them to bench test them, but for now im assuming that they (another shop) may have done a good job, and its something else.

cheers

Trains

edited for clarity

[tweak'e]

i don't know anything on the 1L motors. however it sounds like either injectors to big, timing out a bit.

the other thing, which is proberly more likly, is intake restriction. also check valve clearences, exhust blockages and cam timing.

[tuff4runner]

the fuel pump is full open close it off abit

[trains]

Hi chaps.

valves all ok, done when the belt was done, inlet and exhaust are ok, timing all ok.

Will move the max stop further back again, have already moved it 1/2" along on the threads.

Failing that, will check the injectors at the shop, and see what there doing.

Cheers

Trains

[bribiesurf]

check timing first, but generally black smoke only at WOT indicated some sort of air restriction, do a test with no air intake pipe, it may be getting old and soft and sucking in at higer load points

[trains]

Good point bribiesurf,

Have checked that, ran with bare maifold with no difference.

Will check the max stop, and adjust again.

I originally thought that doing the injectors would have helped the smoke.
Nothing like getting a vehicle, and then learing whats wrong with it as you go along

Trains

[trains]

Ok chaps,
Have finally had the time to catch up with mates lux to have another look at it.

I decided to go right back to basics, and wind back (out) the mixture screw untill it stopped blowing excessive smoke.
(last time I just wound in the max throttle stop, but it didnt make any difference, and the small amount we moved the mixture screw wasnt enough, the board and searches suggested small adjustmets at a time. If I moved the mixture screw too much, ie over 1 full turn, the idle speed dropped to stalling point, and it didnt want to start again untill wound back in a bit).

This time, I thought bugger it, lets wind it right out, and had to wind up the idle speed several times, but finally got to a point where it would not blow any smoke, and had bugger all power.
Wound in the mixture screw 1/4 turn at a time untill we got a slight amount of diesel smoke out the exhaust at full throttle. (Sent out owner up and down street and we observed the exhaust smoke, or lack of it)

Set idle speed, and readjusted the max throttle stop.
It runs smoother now under load, and has bugger all diesel smoke under power and its got the same, if not a tiny bit more go than before.

Just thought I would share what we found, and how we fixed it.

I think I will safety wire up the settings, as who knows what the originals were when we got it. We only started playing with the pump after the injectors were done.

I know a setup on a bench would have been ideal, but this has worked for our cheapie lux project.

cheers

Trains

[RUFF]

Your a Champion Trains ,

I have had the same issues with a 2.8 fitted with a 2LT-E Turbo Charger. I just couldnt stop it from billowing black smoke. I bought it this way. Did compresion test on motor and got the injectors flow tested and both were within specs but this thing just pumped out black. Was just about to swap the engine when i read your reply here so went and did the same adjustments. This engine runs perfect now with no smoke at all.

I had allready had a play with the mixture screw but never thought i would need to wind it out as much as i did in the end. Ive just driven it about 60ks with a mate following me and couldnt get it to blow even the tiniest bit of black. I think i need to wind it up just a little more so it blows a little black down low to suit the Turbo though. But for now im chearing. Although i had allready bought a replacement motor for it. But it will make a good spare for Ron

Thanks Again

[high n mighty]

Any chance of a pisture of the mixture screw for us dumb people??

I'm happy with the lil bit of smoke mine blows but wouldn't have the faintest where the mixture screw is.

[RUFF]

When you are looking down at the pump from the passengers side. Its the screw that sticks straight out the back of the top cover of the pump. It has a 12mm lock nut on it and sometimes has a small piece of wire threaded through a hole in the end.

[trains]

Great news Ruff,

Glad it was able to help you out.
I hope that others find it helpfull too.
Had me guessing for a while, as I didnt expect it to be that far out of adjustment.