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Very very slow until 60mph, then zoom

  #1  
Old 12-29-2004, 12:07 AM
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Default Very very slow until 60mph, then zoom

i have a 1985 300d turbo, automatic, 220,00 miles. from 0 to 60 it takes about fourty seconds, then it takes off. if i leave it in first then second and then drive, holding the rpm's higher it is slightly faster but still very very slow.

i have changed all the fluids and filters. turbo spins with acceleration


thanks for your thoughts

 
  #2  
Old 12-29-2004, 01:21 AM
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Default RE: Very very slow until 60mph, then zoom

have you done good maintenance lately?

air filter?
fuel filter and pre-filter?
 
  #3  
Old 12-29-2004, 02:32 AM
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Join Date: Oct 2004
Location: Canada
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Default RE: Very very slow until 60mph, then zoom

Check your accelerator linkages, and cables for too much slack. Make sure that when you press the accelerator pedal, it activates the fuel pump correctly.

Phil
 
  #4  
Old 12-30-2004, 12:31 AM
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Default RE: Very very slow until 60mph, then zoom

this is a new to me car handed down thru a relative

sleepwalker: i replaced and changed every and all fluids and filters in the motor, tranny.


pberku: yes i checked the cable and it does the same if i control the unit by hand. fuel pressure is good and injectors, banjo bolt and so on have no clogs.

i feel like i'm missing something. if this was a carbureted motor it feels like it was running way to rich. i am not familiar with diesel much


thanks if you have further clues or ideas
 
  #5  
Old 12-30-2004, 01:56 AM
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Join Date: Oct 2004
Location: Canada
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Default RE: Very very slow until 60mph, then zoom

A few questions and three suggestions.

a) What do you mean when you say "... than it takes off"

b) What do you mean when you say "pberku: yes i checked the cable and it does the same if i control the unit by hand"? What unit did you control by hand?

c) Apart from the loss of power issue, are there any other symptoms, ie: hard start, rough idle, exhaust smoke, (If yes, what color), etc., etc..

Suggestions:

1) Do you know how far back in time/milage the valve where adjusted on this car? If the valves are out of adjustment they can create (amongst many other symptoms) a low compression condition, causing considerable loss of power, and resulting in the symptoms that you describe. If you don't know when they were last adjusted, have them adjusted properly.

2) At that milage your timing chain should have either been checked and adjusted, and/or replaced. Do you know if this was done? If not, have the chain strech checked, and if necessary the timing chain replaced. The timing may be way off,

3) Look closely again at your fuel injector pump, and make sure that when the accelerator pedal is fully depressed, that it does actually activate the injector pump to maximum. [DO THIS WITH THE ENGINE OFF

Let us know what you find

Phil
 
  #6  
Old 12-30-2004, 10:54 PM
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Join Date: May 2004
Posts: 32
Default RE: Very very slow until 60mph, then zoom

Could be several things,,,


1) Change your fuel filters lately? Both of them
2) Check your linkage Any slop???
3) Check the boost lines? (from the turbo is a boost line sorta like a vacuum line) if it's clogged, the IP will never inject enough fuel.
4) If boost lines clean, maybe an ALDA adjustment is in order.


Good luck
 
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