They need a copy of the factory service manual, and they need to properly adjust (and perhaps repair) all the throttle linkages first. If they can't do that, you'll need to take the car to a garage that can do that. The service manual is free online (but painful to use to get to the proper pages).
https://www.startekinfo.com/docs?cat=MB%20Workshop%20Resources I do hope, for your sake, that they have not tried to adjust the pump timing! Very very rarely is the problem in the injection pump. Usually a rough idle is due to a bad injector or two, unbalanced injectors, valves out of adjustment, or a leak in a fuel line allowing air into the system. Rough idle at start-up (while engine is below operating temperature) can also be caused by a bad glow plug or two. The only parts of the injection pump that may contribute to a rough idle are the delivery valves. The copper sealing rings (and perhaps the springs) need to be replaced every hundred thousand miles or so. I would not trust anyone other than a certified Bosch shop or a long-time Mercedes Diesel mechanic to attempt this job, because if you screw it up, the pump needs to be removed from the car for adjustment, rebuild, or replacement. ------------- Max Charleston SC On Thu, Nov 19, 2020 at 5:33 PM Kevin Kraly via Mercedes < mercedes@okiebenz.com> wrote: > Hello Dieselers. The guys in the shop who replaced the engine in the 240D > are having trouble with the idle adjustments. Does anyone have the info or > a link for how to properly adjust the idle? I’ve never adjusted the idle on > the IP on any of the cars I’ve owned. > TIA, > Kevin in a hillsboro, OR > 2019 Sprinter 12 passenger 144WB 1659 miles, Low Mileage Lutgard > 1982 240D, High Mileage Hildegard who has an irregular resting heartbeat > > Sent from my iPhone > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
