Cschocke

Hello everybody I'm stumped here. I got this WJ about a month ago. It ran good occasional starting troubles but usually fired on the third try. Drove it to the store turned it off never started again. Got it to idle super rough and no error codes in 8 days of working with it. So far replaced spark plugs, TPS, IAC camshaft position sensor, cut out plugged cat, cleaned the throttle body cleaned the intake temp sensor, and new fuel filter. It will run really rough now unless rpm are above 1500. At a idle sounds like my timing is out. Again happened out of no where. I'm getting tired of replacing possible causes to this but with no engine code it's not been easy. Any suggestions? Next being looked at is MAP, crankshaft position sensor.