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Black smoke is too much fuel. White smoke is water/coolant going threw the exhaust. I would go after the white smoke first. Do a compression test first. White smoke is usually a blown head gasket. If you find it is and fix it. While apart, either replace the injectors/carb or have the cleaned.
Generally, it may smoke on startup for a few seconds then quit and seem to run fine, then you hit the gas and it smokes again, so Is it white smoke gray smoke or blue smoke? Because IMO it's either a bad head gasket, bad valve guides, rings are going bad ot dumping to much fuel into carb or injectors.
Worn valve guides allow oil to drain into the cylinders, causes blue smoke, fouled plugs will idle rough.
Coolant in the cylinders from a blown head gasket will cause white smoke.
Smokes can be of three colors. 1. White smoke.
Excessive white smoke reveals presence of water in fuel, thermostat valve stuck open, or burnt cylinder head gasket. 2. Black smoke. Black smoke could be observed due to the unburnt fuel or higher percentage of Hydrocarbons during the combustion process, defective regulating valve, ruptured PCV valve, low fuel pump pressure, defective charcoal canister, ruptured or leaking fuel injectors. 3. Blue smoke.
Blue smoke reveals the engine failure.
It means you could have a trickle coolant leak into a cylinder or cylinders somewhere if its white smoke. When the vehicle sits the accumulated coolant has to be burnt off when started and it smokes. During driving the leak at the moment is probably not big enough to be noticeable when its being burnt off by the engine. If its initially blueish\grayish smoke, then your rings are wearing
What color is the smoke? if it is blue or grey in color and smells like burning oil then it is oil. If it is light white then it is just condensation and nothing to worry about. But if it is extremely white and smells very sweet then it is coolant.
White smoke is a sign of unburnt diesel fuel, check your glowplugs as thats the most common cause when starting .It will start but not hot enough to burn fuel at start up, also check glowplug relay if not the plugs
Delica Owner 4m40
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