1. Indie mechanic removed #1 delivery valve to check timing. (took it to indie thinking that nailing was indication that timing was off) Timing was less than 1/2 degree off so he left it alone. He replaced DV holder o-ring. Miraculously (or coincidentally??) after reconnecting the line the nailing went away. Slowly, about 500 miles later the nailing reappeared, only milder.

2. Injectors rebuilt by Diesel Injector Service in Portland. Certified Bosch technicians - very busy shop. New nozzles and opening/pop set confirmed.

No real smoke - maybe a little at start-up - especially when its in the "nailing mode."

My pump utilizes both copper crush and o-rings. See here

__________________
327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...