Mitsubishi NOT SURE:
2FD25 hard start and blue smoke on cold engine

Hello

I have a problem with my forklift. It's 2FD25 Mistubishi no 11199, diesel engine 4DQ50 from 1973. When i try start engine, especially in winter days i must long time heat engine by candles and engine start hard. Also i see blue smoke from pipe when engine is cold. When engine is hot everything is ok engine start quick and smoke is invisible.
I do not know what's going on.
  • Posted 24 Apr 2017 05:27
  • Discussion started by lukasz_k
  • Warsaw, Poland
Showing items 1 - 3 of 3 results.
generally when a diesel puffs bluish smoke on starting when cold and not starting up immediatly, it's because of poor or no preheating in the glow circuit.
check the glow heater or glow plugs and make sure they are operational. (mitsu's usually have a glow plug on each cylinder mounted near the injector)

if you have blue smoke while running (after starting) it could be a fuel problem like bad injectors or a injection pump timing issue. Also could be poor air intake like a clogged air filter.

There could be other things causing this but these are the most common.
  • Posted 1 May 2017 21:06
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
What give me result compression tests? For example if compression will be different on cold engine what this means?
  • Posted 1 May 2017 01:15
  • Reply by lukasz_k
  • Warsaw, Poland
Does your engine have glow plugs or an intake heater? It should have something to assist in cold starts.

The blue smoke indicates that the engine tolerances are over spec when the engine is cold- take compression tests when the engine is cold & again when warm & compare the 2.
  • Posted 26 Apr 2017 00:03
  • Reply by bbforks
  • Pennsylvania, United States
bbforks (at) Hotmail (dot) com
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