-
Liqui poly diesel purge FTW. Hard to get in the UK, but used it on so many cars /vans to clean them up a bit. Doesn't fix bad timing /nozzles /pumps/compression. But does help sort out sticky pintels on mechanical injectors, gummed up nozzles, gummed up fuel pump advances etc.
Noticed many modern diesels the fuel filter doesn't have a water drain. Do all mine every 6 months and always shocked by the milkshake /emulsified mess that comes out the bottom (not a lot, likely only 20 to 50ml) of a diesel fuel filter. Can imagine the havoc that any decent amount of water would cause in a hp diesel pump.
BrickMan-
Liqui moly - the stuff from Wurth group? https://www.liquimolyfrance.fr/
At those prices I hope they work.Think that modern diesels the whole system (lift pump in a fuel tank, fuel line and then higher pressure pump) is pressurised so the fuel system including the filter needs to be more air tight (is that right, increased pressure so that increased the susceptibility to pressure loss?) That is the think that I think that sealed diesel filters need to be emptied/changed more often.
lynx
The trick on older diesels (XUD) was to replace the fuel filter and fill fuel filter with injector cleaner and diesel then Italian tune up. Worked great of smoky diesels that weren't trashed. No idea with modern electric injectors. Have taken petrol injectors and cleaned them off the car but is the injector nozzle is worn there is nothing that can fix that.
Have had friends used egr cleaners in fuel and that worked to turn the eml off so did the job.
Then I do like doing oil changes, and filters. Cleaning the engine bay, not by pressure washing either.