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  #1  
Old 09-13-2009, 10:42 AM
fred98050's Avatar
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Join Date: Aug 2009
Location: Seattle, WA
Posts: 214
Engine vibrations (sometimes)?

85 300sd

Car runs great 99.% of the time. I have noticed that sometimes after an HWY trip the engine vibrate so much at idle , it feels that it is running on 4 cylinders....
Accelerate a bit and it's gone, to come back a few days later.

All new fuel filters, new air filter, compression checks good.

This happens only at idle after the car has been running at 60 to 70 mph for a while, and not every-time. Makes it difficult to troubleshoot.


Any ideas?
Thanks

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  #2  
Old 09-13-2009, 11:01 AM
toomany MBZ's Avatar
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Join Date: Nov 2006
Location: central Va
Posts: 7,820
Rack damper?
How old is the primer pump?
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83 SD

84 CD
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  #3  
Old 09-13-2009, 12:06 PM
Ian White's Avatar
machinemanjr
 
Join Date: Jan 2009
Location: Spokane, Washington
Posts: 728
Maybe you have a bad injector...
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Ian White

1995 E300 Diesel w124 OM606
2014 E550 w212 M278 biturbo

2001 BMW 740i E38 M62 (past)
1981 300SD w126 OM617 (past)
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  #4  
Old 09-13-2009, 12:31 PM
fred98050's Avatar
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Join Date: Aug 2009
Location: Seattle, WA
Posts: 214
Upgraded the primer pump 2 weeks ago with the new bosh, no difference.
I might be due for new injectors, what would you recommend? I think that i saw a thread where people praised a non bosh product but i can t find it any more...

F

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