What spark plugs did you install? Jeep likes copper core ZFR 6F-11G gap set at .040
Which brand of coil packs did you install? I used Standard Brand coil packs with no issues.
What OBD 2 codes are you getting?
Any Group 34 will fit directly into the KJ. Of course the AGM is best.
The best AGM is an Odyssey Battery, but expensive. Odyssey uses virgin lead.
My Odyssey AGM is now close to 13 years old & still fires Jeep right up !!
If you buy the best, it won't die like the rest. :)
I stopped buying lead acid batteries many years ago. AGM's tend to provide greater cranking power, especially when it's below freezing.
You won't see corroded terminals on AGM's either.
I'd also like to mention that short trips can make the KJ unhappy as the stock pcv valve, can become plugged up with a yellowish foam.
Best thing is to drive the jeep a bit further !
This is what my pcv valve looked like due to short trips in cooler weather. Are you using a full synthetic 5w-30...
This code means that the engine did not warm up to 180 degrees in 10 minutes after startup.
Could be the thermostat is stuck open? Try a new Mopar thermostat?
Only use Mopar Hoat Coolant or Zerex GO5.
Not good at all. No quick fix here.
The leaky heater core is a big job & you don't want to breathe the misty coolant vapor. Make necessary leak repairs first. Don't drive it.
Once you have a new heater core installed, then find a shop with a pressurized coolant recycling machine to get new Hoat...
Welcome to the forum. Sorry to see the deer impact damage.
Every year jeep seemed to make changes & that can confuse everyone. Possibly find another 2005.
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