I have a 1987 190D 2.5 and it has developed a engine miss. It only misses at idle and up to around 1500 RPM'S. I replaced the o-rings and seals on the injector pump's delivery valves.
I think they torque at 10NM, what happens if one isn't torqued enough? Does the torque regulate the fuel pressure?

Please help....Rvroby@netzero.net