Hi All,

I have an 88 190E 2.3. It has developed a rough idle problem. When it is idling hot or cold it seems to be running on three cylinders, however when I get to about 2000 RPM it seems to smooth out. Also I noticed when I checked the distributor cap that it seems to be arching (cap and rotor only have about 1,000 miles on it). Could this be a distributor problem or????? Any help on where to start would help.

Thanks in Advance,
Merpar