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hi i have a 2020 15 eco blue diesel i in stalled this tuning box works great auto gear box i wonder if ane one could help me i used the speed limiter at 70 mils an hour when i got to 70 the speed limiter cut in for a few seconds but the power of this box nocked the speed limiter any one got any idea what can be done to stop this thanks for any body can help
 

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Chuck it in the bin and get a proper remap. Box probably just fooling the ECU into thinking the fuel pressure is too low
so it increases the pressure. But as you have found its probably exceeding its parameters which throws a fault code.

As you maybe able to tell I am not a fan of them. A proper remap with a rolling road run can be tuned to your
requirements. Want all the power low down for towing or a more punch at the top end even if it loses a little low
down then they should be able to do that for you.
 
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