I set mine to 1.00 with the pin in the hole. I had to mess around a little by
slipping the belt on the pump sprocket a tooth off so it would line up w/TDC
and still fit the pin in the hole. My pump is red dot not yellow dot. I read
yellow dot can take more advance. I am not a diesel expert but I would try to
set it up again with less advance and try to get it at TDC with the pin in
and cam locked. I don't think the 1.9 injectors would matter although mine
are 1.6 so I don't know firsthand. My 1.9 is a lot less noisy than the 1.5
Jetta for sure.

Ken Hunter
82 Westy 1.9D NA
84 Jetta 1.5D NA
89 Mitsubishi van 2.4gas