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#1
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Rough and shaky idle on a 2002 SL500 (R129)... NEED HELP Please
My car is experiencing a periodic hesitation when accelerating from low revs.
It also idles rough and has a very noticeable shake when in park and drive. It drives just fine, but when coming to a stop it starts to surge and when I come to a stop the rough/shaky idle starts up again. I've already: -installed 16 new spark plugs -installed 8 new ignition coils -replaced both motor mounts and trans mount -removed and cleaned the TB -checked all the hoses by the TB (all were connected and seemed fine) Any help/assistance is greatly appreciated. |
#2
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My car also has an aftermarket supercharger and an adjustable Kleemann MAF clamp that was set at 597 omes. Tonight I adjusted it to the Kleemann's suggested setting of 475 but have yet to drive it to see if that helps or not.
Should I reset all of the adaptive values so the ECU to adjust to the new MAF setting? Again any help is Greatly appreciated. |
#3
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Re-adaption of the crank sensor will normally help that type of issue.
MB scanners have that provision. You must drive at 2100rpm in 3rd gear for 30seconds with a 50% load.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#4
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Thank you M.B.DOC.
I currently have a MEMOSCAN scanner, but it doesnt reset any of the ECU's adaptation. I can only reset error codes which I dont think will help me for this task. Can you suggest an affordable MB scanner that will enable me to reset the appropriate values? Will something like this do: |
#5
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If your canner has "live" data, drive the car watching the load at the above prescribed manner.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#6
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My scanner has live data, so I will do as you advised.
I didnt know you could re-adapt the values without having to reset them via DAS. Please correct me if I'm wrong. Last edited by Tech-Tune; 02-24-2010 at 12:18 PM. |
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