General help tdi smoking

[cymru]

Originally Posted by outnumbered

interesting comments all cars are different, quote the timing will always be correct as long as the eml is off, wrong, the timing as you no has to be in a set tolerence it can be out of tolerence even without the eml light on, this can cause black smoke. i did a members car which had these symptoms, the pump timing was way out no eml light on adjusted the belt and less smoke. i agree you have to work these engines but the system must be correct first or you will be all day thrashing the backside off it.
mike
850 tdi p box

think what am going to do is filter kit,
and then take it from there,
to check the timing is it just a case of taking it to a garage that has the program for a volvo tdi and pluging the car in. or can it only be done by checking the timing marks..
thanks

[outnumbered]

Originally Posted by cymru

think what am going to do is filter kit,
and then take it from there,
to check the timing is it just a case of taking it to a garage that has the program for a volvo tdi and pluging the car in. or can it only be done by checking the timing marks..
thanks

hi
it has to be done at a garage, with the engine running. i live in leeds bit too far for you, i would have done it for you foc.
mike

[cymru]

Originally Posted by outnumbered

hi
it has to be done at a garage, with the engine running. i live in leeds bit too far for you, i would have done it for you foc.
mike

thanks for the offer mike.
i'll pop round a few garages this week,
cheers
steve

[Chris_Rogers]

Originally Posted by Clan

Black smoke is unburnt fuel i cant see how the oil can affect that whatever state it is in . The timing will always be correct as long as the Engine managment light is off , It is controled by the Engine Control Unit . Yes it can be checked with a Volvo scan tool , but thats just to get the basic position that the computer can work with .. it will advance and retard correctly from there . The Light will come on if the computer cant get the injection timing it needs due to adjustment parameters being out of tolerance ...

You seem to be suggesting that the timing can't be out if the MIL lamp is not on.
Practical experience shows this is not the case, typical senario is that the timing belts have been changed but dynamic timing has not been done due to lack of equipment or ability. Customer then complains of smoke & or poor performance there is no MIL lamp on.
Completing the dynamic timing cures the problem.
Note that the Volvo scan tool requires that to do the dynamic timing there must be no DTC's in the module, if the MIL lamp was on for a timing problem, and it will only be on if there are DTC's, then you could never put the timing right.

[Cypher007]

would Forte diesel injector cleaner be worth a shot?