Starts fine but when switched off will not start for 10 mins or so, cranks over but does not fire[94 4.0 jeep cherokee]

You are probably unaware that your jeep has an aftermarket keyless entry system....Try this....roll down the drivers window....push the power door lock......get out/close the door...and attempt to open the door as u normally would.......it should be locked...... use your key to unlock the door....get in.....insert the key into the ignition and turn it to on...((((DON"T TRY 2 START IT UN TILL THE WARNING BELL STOPS DINGING & ALL THE DASH WARNING LIGHTS ARE OUT)))...........usually 5 dinging sounds.......at any rate just wait untill the sounds stops and fire up your jeep.....i hope this works for ya.....good luck