hacker,

I can't find my reader and codebooks, but I'd suggest googling the codes it gave you. Not familiar w/ '96 stuff (got an 04 tj, ie MORE emissions stuff!). About a week after I got it, the "mil" light came on, solid (blinking is BAD). Bought myself a reader, and the code translated to "VERY VERY SMALL LEAK" in the evaporative emissions system.. later it turned into to very small, then small, then LEAK. Could hear it easily, w/ hose to ear, but never find it beneath my header and above my exhaust down pipe setup. Eventually things got bad.. at idle it would occassionally rev up to like 1.2k rpm, once, then back to normal. THEN eventually, it started struggling BIG TIME.. Had to drive it off sand to hardtop, then trailer to dealership. The throttle position sensor, MAP sensor, and one O2 sensor had gone... dealership couldn't find leak..
..had to change oil pan recently, and w/ everything between ex manifold and cat off, I could see... ..what do we have here?! A vaccuum line, dry rotted at both ends and seem splitting! OEM/factory line is CHEAP..

keep searching and fix the problem, cause it will prolly just burn out more sensors over time.

-franz