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Always best to drain as much coolant as possible, but not required, just ensures a cleaner coolant system. A few things I recommend/I did when I replaced my water pump. 1. This is a good time to also replace your thermostat since you will be working in/around that area. T Stats cost about $7-10...

Tried the on/off key dance....no dice. Tried the key on while holding the trip reset...dash and gauges went through a fancy test, but still no codes. Took it to Napa, no codes stored. Let it sit turned off for about 10 minutes, went to start it to try and reproduce the code with the reader...

UPDATE: Today I had the problem happen again, this time as it was stumbling to get started/rough idle, the check engine light started flashing and flashed on/off for about 10 seconds. After 10 seconds it started idling fine and the check engine light stopped flashing and turned off? Is there a...

YoungL, I have confidence you can do this! I just replaced my water pump because I was having the EXACT same problem that you are describing. Only took me about an hour. Mine was leaking from the bottom/side of the pump, dripping into the V shaped oil filter drain chute, then dripping onto the...

If you are going to replace the water pump, it might be a good idea and spend an extra $7 and replace the thermostat ($18 for a fail-safe t stat) while your down there. I actually had this same issue you had with my 06 Liberty. Coolant was leaking and dripping into the oil filter drain chute. It...

Thanks CactusJacked. I will start with a pressure gauge. I also thought about checking the spark plugs as they are easy to get to. Maybe just a fouled plug or two. Also something else i noticed. It only seems to have problem starting when the fuel is below 1/2 tank. Not sure if its related or...

Thanks for all the help guys and thank for the links to the other threads. A few things I forgot to mention: 1. I also have the overflowing gas tank problem (pump at the gas station doesnt shut off on time and fuel spills when refueling) Not sure if this would be related. 2. I live in Colorado...

Hello fellow KJ owners. I am rather new here so please let me know if I am doing anything wrong but I am having an issue starting/re-starting an already warm engine on a 2006 3.7L Liberty with 134,000 miles Over the past few years, now occurring more often, my KJ has had trouble starting...