Also on the search
I also am trying to find the fix for this on my 2006 Liberty Renegade. I have already replaced the cam and crankshaft sensor, 02 sensors, map sensor, Idle air sensor, PCV valve, spark plugs, Knock sensor, TPS, etc. I have the throttle body area cleaned regularly..but I don't believe it has ever been taken off and cleaned that thoroughly...that may be next. I am a rural mail carrier so the carbon really builds up...around 44,xxx miles a year put on it and allot of stopping and starting each day. Mine also starts fine in the mornings, idles well, no more surging or rough idle since several sensors replaced, much cleaner ran through and lucas oil stabilizer put in at each oil change. It is just the warm starts as you describe too, that are still causing me issues.
One thing I have found is to go with the OEM parts for the sensors. I have spoke to numerous mechanics (none at dealerships) and they have tried the aftermarkets but in the end found much better success with the OEM parts for all the sensors. They really are not that much more money. It has been suggested to me by a dealership, that there may be a valve issue in the engine. I know there is a service bulletin for the valve guides and locks. The price quoted was at the least $1500 to remove the heads and replaced the guides and locks.. if anything needs milled,etc the cost of course goes up. The Jeep has 176,xxx miles on it and it has been nothing but issues since I bought it. I'm just afraid if I spend all that money..it will still have a bad idle or rough warm start. I nor any of my local mechanics are convinced it is a valve issue...yet anyway. Every sensor we have replaced has helped how it idles and runs. I'm running out of sensor ideas..lol I thought maybe I had found the solution..the EGR valve but apparently the 2006 gas Liberties do not have them just the diesel. Does anyone know if there is another sensor that replaces the EGR valve for the gas engine? Good luck with yours, I know how frustrating this is, as a carrier we are to shut off our vehicles at certain times if away from the vehicle. It just is a worry, never knowing if at some point it won't start back up and I'm stranded out in the woods. lol Not sure if I've hindered or helped you. Maybe the cam or crank sensors will help yours. Hope it goes well.
2006 Liberty Renegade
1996 Jeep Cherokee Sport