I bought a 2002 Grand Cherokee, limited, 4.0, and has about 160,000 miles. Most recently I've been having a problem starting it, usually the first start of the day, it will turn over but not completely start up unless you give it gas and keep it revved at about 2,000 RPMs for 30 seconds and then it will run fine. Usually after that initial start it will run good and sometimes it will go days without doing it again. I have been doing everything I can think of to try and fix it but I just can't figure out why it's doing that. Any help would be greatly appreciated. I have replaced numerous parts, new battery, cables, o2 sensors, spark plugs, tps sensor, idle air control valve, cleaned throttle body, fuel filter, air cleaner, coolent system flushed and filled, had alternator checked, fuel pump runs when key is turned, checked ignition switch with no sign of issues. Has anyone else had this issue? It also is an R title but this didn't start happening until about 6 months after buying it. Thanks in advance for any tips or suggestions

Just bought one today I am going to try it out the next nice day I get thank you for the reply will post results

No it is a blown head gasket so sell it and run!!!