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  #1  
Old 07-10-2018, 07:29 PM
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Join Date: Apr 2011
Location: Toronto, Canada
Posts: 229
1985 300D (W123) - Engine shaking/chugging symptoms

I noticed cold car starts, drives,accelerates fine on highway etc. However after a 2+ hour drive, when slowing down to idle it chugs like crazy and I have to give it fuel to stop the shaking.

-new glow plugs
-valve adjustment done 45,000km ago
-new fuel filters all around
-fuel pressure seems fine - lots in prefilter
-rebuilt fuel injectors 30,000km ago
-compression is all above 330
-regular oil changes at 5000KM intervals
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1985 Mercedes 300D Turbo Diesel: 500,000KM
1986 Mercedes 300E (Sold)
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  #2  
Old 07-10-2018, 11:30 PM
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Join Date: Nov 2005
Location: Sunny So. Cal. !
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First, it's time for another cold valve adjustment, never forget " K.I.S.S. " .

Then, look for intake leaks in the fuel hoses or maybe the hand primer pump .
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