That sounds more like the bad ground issue. My JKU auto was doing that - would start if I moved the shifter to Neutral from Park. There is a service bulletin on this and how to put an auxillary ground strap on to fix the problem.

 

Thanks I'll look into this route if I have any more issues. I am familiar with the "Big Three"(late model corvette) ground mods.. It involves Alternator to ground Battery to ground Alternator to Battery wiring upgrades. I am guessing this is the same thing?

 

Depending on the climate you are in, a battery (regular) is only good for 3 years.

 

Get a Die Hard battery.

 

CR magazine (Nov 2011) has a battery rating/testing/recommendation section. Good info

 

Since I replaced the stock battery with the AGM battery I have had no more issues. Thanks again!

 

sort of. I think it is engine block to tranny to firewall. Like I mentioned, your dealer has a technical service bulletin on it. It acted just like a bad battery on mine and even fooled one mechanic because the battery wasn't charging properly either. I bought a new Optima and still had trouble before finding this fix!

 

The "big three" is a good start, and a must for most vehicles, even stock ones. It consists of a larger cable (at least 4 gauge, I like 2 or 1) going from the alternator's output lug to the positive side of the battery. Then ground cables can be routed from the negative side of the battery to the chassis and engine block. Some will take it a bit further by going from the positive lug on the battery to the fuse block. Basically, just replace every stock battery cable with a larger cable, and make sure your connections are tight, clean, and use plenty of dielectric grease and heat shrink tubing. It's not a bad idea to add an inline fuse to the alt-batt cable, just make sure to match the fuse to the alternator's output (pretty sure it's 160 amp output for the JK, so 180-200 amp fuse).

 

I had to replace my 09 battery with only 25,000 miles on it.... shitty... I also have a 12" sub, extra lights and a winch.... so i kinda was asking for it

 

Yeah, definitely the battery as you now know. You got more than your fare share of use from an 07 just like I did. I had to replace mine a couple of months ago. My Father in Law runs a wrecked/salvaged/repo yard. Took the 07 battery and swapped it with a brand new one out of a wrecked '11 Wrangler. Score.