You guys helped me in an earlier post with a transmission shifting problem for which I am still thankful. Now on to my new problem:

Driving the car it started to stumble. It was on the highway. Just started losing speed. The symptons were very similar to one time my car died because the fuel filter was clogged. Just had a 30,000 mile service and looking at the filter it is clean. Any ideas for feedback would be appreciated.

The advice is always the same when a diesel fails to run:

Change both primary and secondary fuel filters.

It does not matter whether the filters were previously changed yesterday..........or five years ago.

Thanks Brian - I hope it is that simple. The smaller fuel filter is the one I checked (not sure if primary or secoundary).

I will keep you posted.

Any other thoughts - anyone?

The smaller one is the primary. Checking it visually is generally meaningless unless it's plugged with fungus.

There will be all sorts of "other thoughts". None of them matter until you do both filters.

Change both filters first. If you still have problems you might have to clean the screen that is inside your fuel tank and blow out your fuel lines. We can talk about that later if it actually has to come to that.

Scott

__________________
Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

If you just had a service and the filters were replaced, it's possible that a filter or hose connection was not tightened and you are sucking air into the fuel system. So check the connections when replacing the filters.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Primer pump too will kill the car if left loose with pump handle not tightened down.

Well both fuel filters were OK however I had them changed. The culprit was the screen coming from the fuel tank was all gummed up. Replaced the screen and the other filters for good measure.

Thanks for everyones input and guidance.

Yep its always good to verify good tank flow/a clean tank screen every once in a long while....

__________________
-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)