A class 170 cdi engine noise - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 04-14-2007, 09:48 AM Thread Starter
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Date registered: Apr 2007
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A class 170 cdi engine noise

Hi Folks,
Need help on this one. A recent development in my LWB 170 cdi 02 model with only 39,000 miles, is when the car is ticking over it runs on 2 cylinders and when the engine is slowly revved up it gets this piston slap type of noise and when I put the foot down it completely disappears and runs as sweet as a nut. I have tried using various diesel additives that are supposed to clean up the carbon deposits which they probabely do but it does not get rid of the 2 cyclinder tick over noise. Is this related to an injector problem or is it related to a fuse or something. Has any one experience this before and if so how did you sort it.
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