High idle RPM after long trips - PeachParts Mercedes-Benz Forum

Meridivs · #1 06-20-2006, 12:53 PM

My 617.912 Diesel engine seem to have developed a very strange behaviour after long trips - the idle speed goes up to 1000 rpm instead of normal 600-700 rpm. If I put it in 1st gear and move a bit the rpm speed goes down to it's normal value then it goes up again.

Does anyone know what causes this very odd behaviour to a 3000cmc 617.912 Diesel engine?

Maroon 300D · #2 06-20-2006, 02:00 PM

Does it also get 'the shakes' after a long trip?

Meridivs · #3 06-20-2006, 03:35 PM

No. This engine runs perfectly otherwise (new injectors, new injection pump, complete engine rebuilt 8.000 Km ago).

The only problem would be this odd idle rpm change.

Maroon 300D · #4 06-21-2006, 11:47 AM

Well I have no ideas. But hopefully the bump from this reply will cause the right person to see your post.