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Old 08-10-2000, 12:38 AM
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Join Date: Aug 1999
Location: ANNAPOLIS,MD. A.A
Posts: 31
I HAVE CHANGED THE OVR,IDLE AIR VALVE,NEW PLUDS AND STILL A ROUGH IDLE WHEN A/C IS ON. WHAT TO LOOK FOR NEXT?
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Old 08-10-2000, 02:04 AM
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Join Date: Jun 2000
Location: Tucson, Arizona, USA
Posts: 180
I have been tracking down a rough idle on my 190E 2.6 recently. Many lessons learned! I would suggest looking at the rotor and cap for corrosion and general wear, check the resistance of the tips on the spark plug wires (I found a bad tip among other things), and check out the Electro-Hydraulic Actuator (mine was leaking around the gasket and may be worn out). And in the end, probably some roughness is to be expected with idle + A/C. Hope this helps and that Benzmac will be recovering away from work, leaving Steve to correct me!

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89 190E 2.6
83 300TD Turbo
75 240D
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