lately when i start my mb it will run for about 2 sec. then it will run like its running on a couple cyl's then stop. if i wait a few minutes and start it it will do the same thing. I did put a duel timing chain in it 2 winters ago but it just seems like the throttle hunts a little sometimes. Fuel pump?? I replaced the fuel filter. Thanks Bartman
If i keep trying to start it it will run. (sooner or later)

Fuel accumulator, weak fuel pumps, fuel pressure regulator. All possibilities, and in that order....

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

where is Fuel accumulator located?

Its connected to the fuel pumps and filter via a 3-part metal line underneath. Its up above them by itself in front of the rest of the stuff. Be warned, they are pricey....but critical to proper operation/starting.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Thank You...I found an aftermarket for $76.00. I might go that way.

Bart, it's OK to buy an OEM replacement part somewhere other than your local MB dealer, but I wouldn't recommend buying a Chinese knockoff just to save a few dollars.

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Fred Hoelzle

Fred, would Bosch be a good one to get?

The stock one is probably bosch, most of the other parts of the EFI are. If you arent sure thats what it is why not try a junkyard one? I doubt it would be more than $5