starting problem

i have a 1990 4.0 xj when i turn the key to start it it makes a click noise and some times does it 2 or 3 times before it finally starts

Key, key to lock cylinder, lock cylinder to remote rod, remote rod to ignition switch, ignition switch to starter relay, starter relay to solenoid.

So, when was the last time you put a full charge on the battery and had it load tested? Cleaned both ends of the battery cables, positive and negative? The single unibody ground--rear of head, driver's side, to the firewall--POS braided strap, replace it with 4 or 2 gauge cable.

Auto or manual transmission? The NSS on the auto interrupts the ground to the starter relay to prevent cranking unless the transmission is in Park or Neutral. They get dirty and fouled with age. JP Magazine article on DIY NSS: http://www.jpmagazine.com/techartic...eep_cherokee_neutral_safety_switch/index.html

Other possible problem is an oil soaked starter/solenoid--how is it looking down there?

That should keep you busy, post back with results.

Clean your battery terminals/cables. After that, clean/refresh all the grounds at the dipstick tube, back of head, and firewall. Remove connectors, clean and shine, remove paint, put back together with dielectric grease. Anything less is a cop-out.