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Old 09-10-2007, 11:42 AM
300sdToronto 300sdToronto is offline
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Join Date: Mar 2006
Posts: 545
617 hesitation at 1500 to 2000 rpm

I have suddenly experienced the same symptoms with my 83 300sd.

Driving to the airport on Friday in heavy traffic moving at around 40 mph or so, I noticed a slight fluctuation in power lasting about 0.5 to 1 second while accelerating GENTLY from rpms in the 1500 to 2000 rpm range. This happened to me 3-4 times in 50 miles of driving.

No problems at higher rpms/speed or in city driving.

No recent engine or fuel system work. Both fuel filters replaced about 8K miles ago. Only difference I can think of is that I ran a couple tankfulls of B20 20% biodiesel blend through the car recently.

No nasty black or while smoke problems either.

I have seen several postings with this type of issue with no good replies. Do I need to wait until this problem becomes much more consistent (or goes away) to diagnose it?
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