Hey yall, I've got a pretty new to me 1999 jeep 4.0 cherokee with 98k miles on it. it does get about 7 codes... below is a list of what has been done to the jeep and what codes i have. Any kind of help would be appreciated. Thank you.

P0302 P0304 P0138 P0305 Po306 P14940

All new sensors, crank shaft, cam shaft, mass airflow, map, idle air, throttle position, All new fuses in cabin and engine bay, New ecu, New fuel pump and clean tank, Vacuum lines traced and fixed and installed missing components, Cleaned throttle body with new gasket, New o2 sensors, New thermostat, New starter, new battery, Spark plugs, Distributor cap and rotor, Ignition coil.

Thanks!

 

Looks like the codes are for cylinder 5 and 6, id check the spark plugs there first and make sure they are gapped good and sparking

 

A good scan tool will be your best friend. Live data is the way. Ric