Hi DieselDude,

I seem to have a problem with my 98 BMW725 TDS...the problem is at idle...there is so much fuel knock, my question...is there a quickfix to this...like diesel fuel additives/conditions that can minimize or eliminate it. About the fuel knock, its only present at idle around 800-900rpm. If I just tap the accelerator very lightly to keep it at 1000rpm the knock is totally gone....if I pump the accelertor several times very very quickly and let it idle it will idle without the knocking sound for about 2 seconds and the the knock returns...I also would wnat you to know the car has no problem at all, power is good, not much smoke emited when driven hard.
Another concern of mine, the car does not start quickly even when already hot, it will take 2 to 3 revolutions before the engine fires up...Whats your suggestion?
I believe you have a shop...are you capable of rebuilding the pump and are the parts available if ever I have it done? Could the injectors be a possibility or is it the pump, or thats just normal for older cars?