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19 Posts
I have a 1991 EXT 550 special that seems to be running on one cyl at idle, but once I bring it up to half throttle or so, it seems to run on both. I've changed the plug wires & plugs(many times). Just hoping someone can help me out. Could the CDI be causing this or does it sound like a stator problem. It doesn't seem to change with operating temp.