since youall were so helpful with my last issue, i have another one that might be more up your alley!

the car is VERY slow, not just 60 some horsepower pushing a 3500 pound car slow, it is obviously something out of whack!

it only occurs when the engine is fully warm and when starting from a dead stop, rolling stops do not effect it.

what it does is the engine basically just idles, regardless to the accelerator pedal position. i have had to change my teavel routes so i can deal with it, but now i have a week off for summer break and want to fix it before classes begin again.

the engine runs like a top and, dare i say it, is quiet and smooth. it was purchased in january with 129k on it and i have since put 6k on it to total 135k. will a timing chain effect performance like this? im willing to bet that it hasnt been changed before. but maybe it has, all the filters on the engine were OE, someone cared for the car, but didnt leave the records in the vehicle. so let the thinking begin!

any help would be appreaciated and thanks in advance!

have you looked at the fuel filters?

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

if the filters have black dots in them you have algae in the tank. if so go to a truck or tractor supply and get algaecide...use as instructed

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

ive been through that, it was my first adventure with a broke ass down diesel!

i removed the tank, pressure washed it, soaked the screen in mineral spirits and cleaned it with a toothbrush. that cannot be the problem!

as far as dirty filters go, i just changed the pre filter(second time since ive had it) and assumed the big canister filter would be fine(3 small filters to one big one?)

Wrong assumption.

The canister filter, also known as the secondary filter, contains media that will provide the very fine filtering necessary to protect the IP. If this filter gets clogged, the engine won't rev. The pre-filter is there to stop any boulders from entering the secondary.

Change the secondary filter (large bolt on top) and report back.

brian is right on re the large filter...also,


the algae can come from the pump. so even if you did all that, if you got a bad batch of fuel you could be all plugged up again. look for the black dots in the primary filter.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Very common for the linkage to have rubber bushings missing or other factors causing the linkage on injection pump to not reach the fully open position. Check it by having a friend prefferably a pretty girl press pedal to floor. Check if arm on injection pump is going to full travel by seeing if you can push it even further by hand at injection pump with engine off of course. If you have a genuine low milage car the timing chain etc are probably still good. Is your car a standard transmission model? Also what year. Wish I had one with about 130 k on it. Needless to say this is just a suplementary check that should be done anyways on these older diesels as what the others posts have stated is the most probable cause. If you have never changed the secondary filter especially. Also do you have a nice clean air filter? Diesels just seem to run better with them although I do not think by any stretch that the air filter is your problem.

i am not sure about this, however. at some point the car was changed to have "exempt" o the mileage portion of the title.

this said, i believe it to be correct. the car is immaculate on the interior, but just torn up enough to make me believe that it is a 26yo 130k car.

pictures can be seen here: http://www.benzworld.org/forums/forums/thread-view.asp?tid=1209541&posts=17&hl=shlomo

let me know if you think i should reconsider thinking it has only 135k on it!

**edit**
I got the crankcase cleaner(internal kind) and two gallons of fresh rotella t tonight along with the two fuel filters and an oil filter, i will spend the day with it and do that and then report back, my dad said that he would help me set the valves this week as well, but i cant do that after changing the oil=) so itll have to be the day after tomorrow(unless catastrophic geological events prevent it)

knowing the actual total milage on a car is not all that important. You probably have one of the best type of cars for your age group. One of the good things is that you can cope with a lot of things on this car plus parts are pretty reasonable when and if you need them. You may encounter a few problems but they will strengthen your self confidence as you deal with them. That is an extremely valuable benifit. The problems will not seem that minor to you the first time around but the expression that anything worth learning has to have some difficulty is perhaps true. You are obviously learning already and with a site like mercedesshop how can you really go wrong? Before you know it you will be helping others out. I already see you are projecting a little differently. Remember also to develop judgement when reading helpful suggestions. What I say is just my opinion and should be taKen that way. I too like your car and try to treat it like a classic as they will never make cars like these again and that is truly too bad.

the engine does run smoother/quieter but it still doesnt perform like i think it should!

let me drive it some more and i'll let you know how its doing. just, after spending the 40 some dollars to do everything now im short on gas money hahaha

such is life, huh?

Clogged fuel filters would more likely affect high speeds,

Poor acceleration from stop is very likely to be cured with an ALDA adjustment to richen the fuel mixture. Every one of my cars has needed it and wow, does it make a big difference.

Do a search here to find out how. It's VERY satisfying and easy. You should be able to throw gravel from a start on a dirt/gravel road.

While you're setting the valves, check your timing chain stretch by lining up the mark on the rear of the timing gear with the notch in the cam support. It's on the drivers side rear of the timing gear. With this lined up very carefully, you will have a reasonably good idea if your chain is stretched more than 2 degrees. I think performance is seriously affected around 4 degrees measured at the crank.

And checking your throttle linkage to make sure the arm on the IP is up against the stop when the pedal is fully depressed is a good idea too.

Best Wishes,
Bruce McCreary
(2) '85 300Ds, '83 300CD

i should have been more clear! i dont have a turbo, it is a 240D 2.4!

Read your first post.

It's 67 hp pushing a 3300 lb. car.

How fast do you expect it to be?

Most folks run out of pavement before they can do a proper 0-60 time.

I am sure leathermang will smack me but the car sould be peppy. My 240D, through the gears, will do just dandy around town. I presume you have checked for dragging brakes and the like? I would have a look at the ALDA adjustment if everything rolls nice and easy. The ALDA on my 240D has been tweaked with so my car gets movin pretty good. The 300SD likes it too but that is a whole seperate 100+ HP discussion

How do you like it otherwise? Handle good? Where are you located?

I tell you, what made the biggest difference in acceleration on my 240D was replacing the injectors...just a thought...like night and day.

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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