too much black smoke

[unapimp]

Anytime I try to accelerate hard my poor little diesel smokes bad. In neutral I can turn my grass black from the soot. (I floored it once about two months ago and the soot is still on the ground.) Would de-fueling the engine help a little? How would I go about doing it? Would low compression cause this?

[vwabbitman]

black smoke is normal for a diesel but the way u are explaining it something is wrong. that is a question that garry might be able to answer.(i hope)...

[Darth Garry]

Where do you live? If you live at high altitude, it may be a fact of life. My truck ran like a top, but when I drove through the Sierras she was smoking like mad (black smoke) because the lower air pressure makes it burn more lean, producing more soot (unburnt fuel). There is a fuel delivery adjustment screw on your pump. By messing with that, you can lower or raise the amount of diesel going to the cylinders (therefore increasing or lowering the amount of excess fuel AKA soot). But I've never messed with one, the pumps come set a certian way for a reason. But maybe yours has been tampered with before you got it in an attempt to make it faster.

Garry

[unapimp]

Now that you mentioned high altitudes, I beleive my caddy originated from Oregon. (Oregon State Tropper's Association sticker on the vent window.) I live in South Louisiana. Weren't engines specially calibrated for certain parts of the country for altitude?

I'm starting to think that my caddy's engine has seen better days. There is a lot of blue smoke when I start it. There is barely any blue smoke when it is running, but it can be noticed. I'm starting to think that the compression is getting low. Runs pretty damn good, though.:D

[DieselsRcool]

Probably low compression, worn injectors and maybe valves. Compression and injectors seem to make the most difference. Probably just old. This is assuming yor fuel screw is not turned in.

It amazing how well these things still run when they are completely and utterly worn out.

Pull the head and sent it in for rebuild, hone and new rings, new or rebuilt injectors and it'll most likely clean right up. Or... you could just drive it and don't look in the mirror.

[Darth Garry]

You may also want to consider "my famous reply" - check the timing on your injection pump. The sportruck was having a lot of blue smoke until I properly adjusted the timing on the pump. It's easy for them to get out of whack, as moving the pump 1/32" of an inch in its little slots will throw your timing quite a ways off.

Garry