I have a 1992 Laredo with the 4.0 and auto trans.Last summer I swapped a new motor in and have been having all sorts of issues from day 1.This is what it does:The cooling fan will not come on when the engine temp goes over 210* F, but it will come on when the A/C clutch cycles.My CB will make the jeep go nuts when I try to talk to someone: misfires, backfires, you name it.This is what I did:Checked my harness, the temp sensor to PCM circuit is fine, as is the PCM to fan relay circuit.Replaced the fan relay, cooling fan, pickup coil, temp sensor, MAP sensor, crank sensor, and put in a rebuilt PCM. None of this changed anything. I pulled the PCM out and opened it up, there is a loose capacitor on the circuit board and where they dug out the dielectric goo to fix the board, it looks like they did a shoddy job patching it up. This could possibly lead to moisture intrusion.I'm leaning towards partially brain dead PCM. Anybody else have any thoughts?