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From the 'other' site, and I quote:
"Please Note if your car is updated to the latest ISTA 2.40.1 DME/ECU software the N55 JB+ will only give about 1/3 the gains seen with older DME versions. For those with this update or who plan to get the update we suggest the N55 Stage1 tuning instead which is not affected. There is no method to determine which software is loaded to your DME without consulting with your dealer..."
It continues with "...The N55 JB+ can be upgraded to the N55 Stage1 tuning within six months of purchase by paying the price difference between the two."
Not sure if you've had your car updated recently, but this might explain why your having issues... I'm no expert though... I have the JB3 Stg 1 so I'm not having any issues...
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BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi)
2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune |