This is kind of an old bump but the saga continues. I replaced all the plugs wires rotor and cap and that seemed to fix the problem. It turns out it only fixed they symptoms as I have a cylinder that isn't firing. To top it off I pulled the plugs again today and the number one was covered in black. (these are only a couple weeks old) the other ones didn't look like this.

http://img505.imageshack.us/img505/1422/imga0069vc0.jpg

The fill cap and breather had brown sludge

http://img341.imageshack.us/img341/4017/imga0072da6.jpg

and last but not least the overflow bottle is completly foamy.


Blown HG?

93 Wrangler
4.0L (remanufactured from S&S about 5 years ago)
Mostly stock