ok kinda new to this site and the internet as well. country boy not big on electronics lol. but a proud jeep owner. on hear i keep hearing the terms renix and OBD I and OBD II. can some one tell me what these mean?

 

Renix is Renault bendix injection. Obd 1 and 2 are newer computers with on board diagnostics. Just different types of computers basically.

 

If you have a '93 you have OBD I which flashes a light to inidcate electronic faults. OBD II has a port to plug a scanner tool into, and was on the '96 and newer XJs.

 

Your 93 would be OBD1

RENIX is 87-90
OBD1 is 91-95
OBD2 is 96-01

Here's how to read the diagnostic trouble codes on OBD1 & OBD2:
http://jeep-xj.info/HowtoECUcodes.htm

Being new to the internet, you should know that search engines are one of your best tools.
For example: Here's a google search for renix vs obd1 vs obd2

...and welcome to the forum.