new injection pump "diesel knock"

[92-Eco]

I have just installed a new IP and set timing to 1.00mm. The new pump was out of adjustment when i got it so i set everything off of my old pump and finally got it running good. But, the problem is that the engine sounds different even when timed and tuned just like the old pump. It sounds the same idling but when giving it throttle and accelerating it has a noticabley louder "diesel knock". Could changing the pump do this?, maybe the old pump was worn out or what? Thanks

[burn_your_money]

Where did you get this pump from?

[92-Eco]

i got the pump from www.emiata.com, a guy named Peter Rothenbacer.

[smutts]

The 1.0mm advance often quoted usually works fine with used pumps, but when I checked and adjusted the transfer pressures of my pumps to something like the 35psi to 40psi at 1000rpm engine, (this might be the standard setting, but I don't have the resources to extraordinary rendate any Bosch technicians . So Hagars is the most likely.) Anyway, I get a nasty dose of diesel nailing, rattle, pinking, call it what you will. But putting the engine back to the standard static pump settings worked fine. Unless your new pump has more dynamic advance than the engine can cope with?

[rabbitman]

i got the pump from www.emiata.com, a guy named Peter Rothenbacer.

I've never heard anything good about his pumps.

[vanbcguy]

I'd definitely try retarding it back to the stock setting (or just do it by ear) before I decided the pump was junk. 

Getting more advance at the same static timing setting likely means the pump is producing more pressure faster than your old one was - IE it's less worn than the old one.  Pump wear is a lot of the reason people bump the static timing up in the first place - they're adding advance to make up for wear in the pump which was causing retarded timing.

With a healthier pump you'd want to time it closer to the stock setting...

[smutts]

With a healthier pump you'd want to time it closer to the stock setting...

If you get it wrong, you will have some curiously coloured nozzles when you service the injectors.