full throttle. When at full throttle like climbing a grade on the interstate it used to stay right on 75mph. Lately I can feel a little "cutting out", not a miss, just like it can't get all the fuel it needs and it looses speed.
Changed both fuel filters. The primary had a little black soot like things in it but not plugged.
Still has problem.
Thought the fuel strainer was under the First Aid Kit but it isn't on an SD, i guess.
Anyone have ideas?
thanks,
roberto

85 SD 280k miles

__________________
1985 300SD
1998 Jetta TDI
Previous: lots of diesel VW's, MB's, KW's, Pete, Freightliner


Walking isn't a lost art: one must, by some means, get to the garage.

definitely inspect the tank strainer and fuel hoses. Some searching will bring up tons of info about how to remove the strainer efficiently.

Those 'soot - like' chunks are a fungus that lives in the fuel tank. search 'algae startron fungus biocide'

__________________

Check your wastegate hose and boost pressure. The "cutting out" is likely the overboost system protecting the engine from damage.

How does that 'age' over time? What goes bad and how?

__________________

I was looking for a biocide but couldn't find anything in the parts stores.
thanks for the boost idea FI.
robert

__________________
1985 300SD
1998 Jetta TDI
Previous: lots of diesel VW's, MB's, KW's, Pete, Freightliner


Walking isn't a lost art: one must, by some means, get to the garage.

Switch inlet and outlet fuel hoses to see if the screen is dirty.

__________________
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

i changed the fuel filters. but i only drove out west of town were there is some low hills and i thought it was still acting up.
i took Forced direction to check around the turbo and i checked the EGR. it checked ok as to function on the mity vac, then checked the recirculation? valve. it wouldn't pull a vacuum so i block the line to it.
last night my son called from Socorro with a flat and flat spare (college boy!!) so i headed down with the air tank. car ran wonderful with the cruise on 85 all the way. only one hill but speed didn't vary one mph all the way.
thanks for the ideas guys,
roberto

__________________
1985 300SD
1998 Jetta TDI
Previous: lots of diesel VW's, MB's, KW's, Pete, Freightliner


Walking isn't a lost art: one must, by some means, get to the garage.

Checkout Sentry Diesel Plus for diesel fuel conditioning.... available online

Great idea, waste money on cr@p that doesn't do anything.