Got mine in the mail today also. Every thing updated fine. Maybe 12-15 min. Installed 87 tune and love it! When I put it in reverse to back out of my friend's drivewayI could tell the difference. Got on the highway that I know too well and she didnt downshift at all where it would have 4-5 times before the tune.

 

If you adjusted your fan on temps, make sure they are 20 degrees above your thermostat temperature. If they aren't you'll end up with CELs and a DTC of an open fan relay. Spinning the fan before all your coolant is at a temperature to keep the thermostat open isn't buying you anything.

Autozone has 180 degree thermostats for the JK for $10 as a regularly stocked item now so you don't have to count on the wisdom of the guy behind the counter to cross reference one for you.

 

What's the stock t stat temp?

 

The stock thermostat is 195 degrees, and fan on temperatures should be at 215 or higher. You can adjust the fan to come on at full power when it hits the fan on temp, but you should never go below 20 degrees above your thermostat. You need to allow the coolant to do it's work first before getting support from the fan.

Besides the CEL and DTC open fan relay, the vehicle still needs to reach operating temperature for efficiency. Running a 180 thermostat with a fan on temperature of 200 will rob efficiency when the ambient temperatures are below 60 degrees or so. If you live in a climate that has cooler or cold winters it's best to do seasonal changes on the thermostat, as running a 180 thermostat in the depths of winter is only going to buy you more dollars coming out of your wallet.

 

Well I bumped to the 91 Tune on Friday and think it performs extremely well!! However, last night driving along an get hit with the infamous stall bug?!! I've read on the forum that this is a common thing with the 07's and I purchased used with 34,000 miles on the Rubi, is there a way to check I'd this ever had the flash to fix it or did maybe the flashpaq undo something here? Its never happened to me as long as I've owned it....

 

I've had a 2007 with a Flashpaq since the inception of the product for the JK and don't have a clue as to what the infamous stall bug is and have never experienced anything of the sort.

 

Last night I was cruising along about 50mph through some hills and for a split second electrical failure happened! Lights out, radio out Jeep still running and then dash panel lit up like a Christmas tree! Everyl light as bright as can be and then was all normal again! Never happened before so I did a search and found this.....Another "stall bug" victim thread, Any thoughts???

 

How many miles on the new tune when this happened? Approximate number of key cycles on the new tune? Any DTCs after the fact? Did the engine actually stall or did it go into limp mode for a brief period?

I've had both my Chrysler vehicles go into limp mode and the resulting DTCs to date have never had anything to do with systems related to the Flashpaq. I can also count on the Chrysler PCM'd Sprinter I often rent going into limp mode after about 4-5 hours of continuous driving.

In all if it happens again I would return the vehicle to stock, run a tankful of fuel and take it to the dealer for a PCM re-flash.

 

About 40/50 miles on new tune around 6 key strokes with a new full tank of 93. I've ran the 87 tune for about 500 miles. At the time of incident had GPS plugged in heater on, lights were on bright and radio going. Oh, and no DTC's.

 

I was thinking the higher octane settings may give me better and more noticable results. Just couldn't do that yet cause of having a full tank of 87. The cost of a higher grade fuel and even the mpg really is no major concern cause this is not a daily driver. Drained most of the tank today on an offroad run in St Francisville, LA. A few more miles next weekend and I'll be able to step up on octane.