Originally Posted by
Bailes1992
They are nothing but a resistor in a box.
They tone down the signal from the fuel pressure regulator so the ECU cranks the fuel pressure up.
Heard of a few fuel pump failures shortly after fitting these! Heard of a few engine and turbo failures too.
People think that their fuel economy is improving because the computer says so. But because the ECU is putting in more diesel than it knows about the fuel computer reads higher.
Nothing beats a good remap, but unfortunately they are much more expensive.
incorrect from what i can gather there a piggyback ecu which give the same results as a remap?
same as the tdi tuning box?
Last edited by ben_frst; Feb 15, 2014 at 10:09 AM.