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Old 02-15-2006, 11:38 AM
Registered User
Join Date: Jun 2005
Posts: 17
still sssmoking

Hello everyone
I developed a sssmoking problem on a 81 300D.The problem occurred suddenly. Checked the injectors, they look pretty good for 160K.Changed fuel filters. Car In the beginning idles very rough, eventually even out, but is not as strong, when I put it in drive holding the brake the engine is as if pulling a heavy load. When changing fuel filter #2, the one with the bolt. I noticed that there is a rubber washer located around the bolt that was disintegrated; pieces of it were located in the opening at the top of the bolt. My question is can it be possible that some particles got into the fuel pump, and clogged something up? If yes how do I approach this problem? Any suggestions are appreciated.

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Old 02-15-2006, 12:46 PM
Registered User
Join Date: Oct 2005
Location: Laramie, WY
Posts: 135
I had the same problem on mine, athough I have a 603 I'm sure this may help.
here is a link to the thread. Although I was told by a tech that my injectors were okay when I had them pop tested two turned out to be bad.

1987 W124 300D rough idle and smokes

87 300TD 603 I-6
94 Jeep XJ I-6 4.0 (see the pattern)
89 750il
seventy-two hundred feet above sea level (kinda cold up here)
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Old 02-15-2006, 05:56 PM
Diesel Giant's Avatar
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Join Date: Oct 2004
Location: Loganville/Atlanta
Posts: 2,156
You said you looked at the injectors and they were ok. How can you tell by looking at them??

Looking at the body of one does not tell you anything. I would get them tested and let the guage tell you how they are doing. You could have a host of other problems that can cause smoking.

1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair
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