When first starting my liberty for the day if i give it gas in park it will go up to 2,000 rpm's then the engine jerks and send the rpms down a bit and keeps repeating this pattern.
I can litterally put the pedal to the floor and it will not go above 2,000 rpms
i called a jeep mechanic to see if there was some sort of cold start protection, he told me he owns the same liberty and something must be wrong.
If i put the car in gear this doesnt seem to happen, but im just driving around town at 30mph so the rpm's do not go much over 2,000 anyway. Im afraid to go back on the highway until i know what is causing this.) It also doesnt happen after i have been driving a short distance (i think this is because the engine has warmed up)
i live in upstate ny so it is relatively warm right now, so when i say cold start i just mean that it has been off for several hours or over night.
I bought this jeep a month ago from a dealer with 26k miles on it so i am worried at this point.
2008 KK Liberty
Daystar 2" Spacer Lift With SkyJacker Hydro Shocks
JBA Gen 5.5 Upper Control Arms
Rokmen Riddler 8.25 Differential Cover
2 KC Slimlite 100 Watt Driving Lights on JK Light Bar
245/75/16 All Terrains
Mopar Front Tow Hooks
Mopar Rear Tow Hook
chrysler told them to do a flash update...apparently there is an update to the computer systems already
they told me it probably won't change anything but to try it anyway
If anyone could see if their 2009 liberty with the 3.7 has this happen to them it would indicate to me that this is a feature and not a problem.....the dealer was unable to achieve this information
There are 2 things I would tell the dealer to check,first the IAC,and second,the TPS.Im assuming they checked for vacuum leaks.I have a 08 KK,and it doesnt do this,If I floored mine,it probably would damage my engine.