[SanTex]

i’m not sure what’s going on with my n63, on map 1 and 2 it feels like the motor either dosent realize it has more boost at its disposal or it just dosent like the extra boost. when shifting at high rpms going uphill it is especially jerky. it is not a problem with the transmission as on a stock tune it shifts like normal at high rpms. i pulled the codes and everything came back fine, no check engine lights either. the jerkiness of the motor feels like misfires but i read on other forems that one guy had a problem with his DME kicking in and trying to shut down trottle. i’m really stuck here, not sure what this could be. i should also add that i have catless doe pipes and a fresh motor/turbos with less than 10k miles

[kohsin]

My N63 with piggy back had the jerky acceleration between 1k and 3 k rpm without throwing the code occasionally for about three months. Last week, it had misfire and injectors cutoff. I replaced the engine filters and problems are gone now. My filters were two years old. Hope it's that simple in your case.

[SanTex]

UPDATE:

i was litteraly on the the wrong firmware… i was on the n63tu firmware not the n63 firmware but now i’m having issues with these codes:

120408 Reduced power mode
121001 TMAP sensor, short circuit to B+
121101 Load pressure sensor 2, electrical:
Short circuit to positive

i’ve contacted jb4 support so hopefully i can get this resolved but for now i disconnect the jb4 and the car runs great with no codes, i do have a suspicion the it is not properly grounded so i will check it tomorrow morning

[Omaha Guy]

Hello. Same Issue. Goes into limp mode with higher RPM or higher engine load. New motor, de-catted, stage 2 turbo upgrade, new plugs, "coil packs", injectors, HPFPs.

Running JB4 map 5

How did you resolve your issue?

Thanks

[Hornet-01]

Originally Posted by Omaha Guy

Hello. Same Issue. Goes into limp mode with higher RPM or higher engine load. New motor, de-catted, stage 2 turbo upgrade, new plugs, "coil packs", injectors, HPFPs.

Running JB4 map 5

How did you resolve your issue?

Thanks

what is the power on JB4? real? what is the acceleration 0-100km/h? interesting to compare