Buy a can of Mopar decarbonizing fluid from any Chrysler/Jeep dealer ($7.95)

• Remove the air cleaner assembly
• Start the engine and while maintaining idle spray the content into the intake manifold (Adjust throttle to maintain idle at all times)
• Shut the engine down and let it sit for 15 to 20 minutes.
• Restart and run at approx 2000 for 5 minutes or until tailpipe is clear of white exhaust.
• Take it out for a hard drive, but make sure you do not get a ticket.