Quote:
Originally Posted by H-M3
sorry don't mean to jack this thread, my 4.2tdi has a little box in the engine compartment. its got few switches that you change to fool the ecu i believe? been told they are crap and should just do a remap? any tips guys? NB this tuning box was there when i bought the car.
cheers
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Correct. It'll plug into the fuel rail(s) causing the engine ECU(s) to think the fuel rail pressure is lower than it actually is, so that is compensated by raising the pressure in the rail. This gives a power increase and is by no means the proper way to do it at all.
A good remap will always be better.