Engine turns over on start up but takes several seconds to fire. Sometimes does not start. When crusing at speed slightest hill causes revs to start to fluctuate, engine loses power.
All injectors replaced, timing okay, nothing shows up on the garage computer so possibly a mechanical fault. Any ideas?

Sure sounds like a fuel shortage to me.

Did you replace the cannister fuel filter? Also does it run better with the fuel cap removed? Your tank vent may be plugged.

Good luck,

Jim in Phoenix

I only have experience with the OM648 engine (6 cyl) but the filter should be in the same spot under the left engine cover right in front, try it first.

__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

The CDI is still fairly new here so may be wrong, but, it looks like it still uses some plastic fuel lines that rely on o-ring seals like the OM606.96x used.

Your problems sound like the beggining phases of air entering the system. Phase two is no start and fuel leaks developing.

Check the lines for minute bubbles and if found replace o-rings or the lines themselves.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)