i just bought this 99 with a bad motor. i had one from a 96 that ran strong when pulled, swapped intake/exhaust, and distributor over from 99 motor. changed plugs, wires, cap and rotor. it cranks just fine, has spark and good fuel pressure. i am at a loss. only code its thrown is throttle positition sensor.

 

Thats an easy fix, its located on the throttle body. This should helphttps://www.youtube.com/watch?v=Ig-X95lniWQ

did you put the computer from your old jeep in the new one?

 

Just tried the old computer. Same results.

 

Also put good tps. No more codes

 

Dist clocked wrong ?.....http://www.angelfire.com/my/fan/dist_index.html

 

Thank you freegdr . That was my issue. Now I just Havering figure out why it's getting hot. I think the thermostat is opening as the upper and lower hoses are hot. The heater works good.

 

If it has the original 16 yo cooling system, easier & less expensive to just replace it.