how good are fuel injector cleaners

[hendrix147]

I have a 98 passat tdi i recently changed the air mass meter which has made an incredible difference to the power of the car only problem being is that now when i excelerate quite alot of grey smoke comes from the exaust, i have been told to use redex to clean the injectors, can anyone tell me if this does anygood or not. thanks.

[Skyline316]

yea its not bad just get regular cleaner for the injectors...u no what even works better is brake cleaner

[boschmann]

Grey smoke is more likely the turbo leaking oil.

[veedubmechanic]

Or grey/black smoke is also caused by very rich mixture. VW sells injector cleaner in the parts department, i believe its called sure shot diesel fuel system cleaner. Pretty much seafoam for tdi.