renault kangoo van black smoke cominig from exahust

[don1]

when i rev the engine or pull off there is sutty black smoke coming from the exauste any ideas what it could be its a diesel engine

 

[Quick Fit]

Un-burnt fuel. Try new Glow plugs . If that doesn’t work it could be quite a few things. Cheeper in the long run to go to a small garage and ask them to do a emission test. Lets hope it's not the pump

 

[don1]

Un-burnt fuel. Try new plugs petrol. Mixture might need adjusting.
QF

its a diesel quick fit i have just had a new timing belt fitted about 6 weeks ago could it be the head gasket wats gone

 

[Quick Fit]

unlikely to be a head gasket. It's possible the timing is out.

 

[david and julie]

If you are saying this didn't happen before fitting a new timing belt, then yes it could be the timing. However if you are saying it was OK after fitting the belt, but as gone like this since then I would check for a blocked air filter first.

I also doubt it would be the head gasket.

 

[PowerTool]

Head gasket failure normally causes white smoke,not black (caused by water getting into the combustion chamber)
Black smoke is invariably fuel related (unburnt,as previously said)
And blue smoke is normally a sign of worn piston rings/cylinders (letting oil into the combustion chamber)

 

[jonnyfishing]

Try a bottle of injector cleaner in your fuel tank and take it on the motorway for about 10 miles @70 mph.This will help clean the injector tips and improve the spray.If this fails to sort it out,have the pump timing checked.I assume that you have renewed the air filter.


___________________________
Moderator

post locked to prevent hi jacking