Have a 1.9D Polo 1997, it pulls really well drives great, but has a problem that it seems to be like pinking from about 1800 to 2200 RPM and leaves a trail of smoke behind it, everywhere else it runs great and very little smoke (well apart from when it hits the governor). Its black smoke (un-burnt fuel and it smells strongly of diesel)
I changed the injectors thinking it was them made no difference at all. Tried my old injectors in another car and they ran perfectly.....
I moved the thing on top of the throttle linkage with 4 wires going to it. This makes the smoke much less (and moves it up the RPM a little 1900 to 2200) but doesn't cure the problem.
Any ideas what I can do to sort the problem? Filled it up and added some redex, to make sure there is nothing sticking, but only done about 20 miles so wont have made any difference yet.
Cheers
Stu
Is your timing set properly?
Not long got it so haven't actually checked... Will likely do its belt check reset but don't fancy going to the effort if something else is majorly buggered.
Would have thought that it be doing it all the time if it was timing not just at certain low revs? This is just guesswork tho....
Cheers
Stu