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  #1  
Old 10-29-2011, 07:57 PM
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Rough start white,blue,black oil smelly smoke

Hi, I have a 1994 S350 turbo diesel and lately when I start the engine hot or cold it runs rough and smokes then I turn it off and restart it and the roughness go away and no more smoke, some times it starts to smoke when I stay idle for a long time, Some one suggested I have a bad "cold start valve" is their such thing on this engine?
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  #2  
Old 10-29-2011, 09:03 PM
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I'm not familiar with the w140's but your symptoms sound like air in the fuel lines.
are there any fuel wetness on any of the fuel lines on the IP?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #3  
Old 10-29-2011, 09:11 PM
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not on the IP but on only on some overflow lines.
question; if their was any air in the lines wont it be rough idling all the time.
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1994 ~ S350 Turbodiesel OM603


~~~~~~~~~~~~~~~~~~~~~~~~
1998 Monaco Dynasty 40'
1981 300 SD Turbo 300,000 I Had to let go after 14 years of flowles service.
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  #4  
Old 10-29-2011, 09:16 PM
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not always, especially if you park with your front end higher than the rear... fuel tends to bleed back towards the tank, when you crank the car, most of the air is returned to the tank, or pushed out of the path, then when you restart the fuel is purged, and it runs well.
another possibility is bad glow plugs, causing a cylinder or two not to fire up at first.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #5  
Old 10-29-2011, 09:24 PM
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Yes the glow plugs are a mistery to me but and i need to address it soon
But defenatly their is no cold start valve that you know of
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1994 ~ S350 Turbodiesel OM603


~~~~~~~~~~~~~~~~~~~~~~~~
1998 Monaco Dynasty 40'
1981 300 SD Turbo 300,000 I Had to let go after 14 years of flowles service.
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  #6  
Old 10-29-2011, 09:26 PM
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Quote:
Originally Posted by vstech View Post
another possibility is bad glow plugs, causing a cylinder or two not to fire up at first.
and that will create the white smoke, and roughnes?
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1994 ~ S350 Turbodiesel OM603


~~~~~~~~~~~~~~~~~~~~~~~~
1998 Monaco Dynasty 40'
1981 300 SD Turbo 300,000 I Had to let go after 14 years of flowles service.
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  #7  
Old 10-29-2011, 10:04 PM
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Does the smoke smell like diesel, motor oil or coolant?
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Present
1987 300SDL
1991 300SL
1990 560SEL
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Past
1969 200D 1979-82
1983 300SD 1984-85
1972 250C 1982-02
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1997 S320 2012
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  #8  
Old 03-13-2012, 08:10 PM
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Problem [SOLVED]

The turbocharger was bad worn out seals..............$65.00 later and some elbow grease and see runs like ........New
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1994 ~ S350 Turbodiesel OM603


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1998 Monaco Dynasty 40'
1981 300 SD Turbo 300,000 I Had to let go after 14 years of flowles service.
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