The ECU has no idea the chip is there, so how can it possibly work with it? A rail chip intercepts and modifies the signal between the common rail pressure sensor and the vehicle's ECU, causing increased fuel pressure. It's a blunt instrument using 20-year-old technology, wrapped in a new enclosure.ĭespite some logic-defying claims, a rail chip doesn't work with the vehicle's computer and it doesn't control injector timing. I really can't see why anyone would bother buying one today.Ī fuel rail chip plugs into the common rail pressure sensor and fools the ECU into demanding more fuel pressure. Apparently, revealing how rail chips work -and why they are obsolete technology- wasn't something they wanted people to read! But that obsolescence has only become more obvious over the last few years as technology has continued to evolve. Last time I wrote about the limitations of fuel rail chips, it resulted in legal threats from the company behind one of the better-known brands in Australia. This time I'll just talk about one other type of chip, and go into remaps in more detail. In the last article I discussed a few other types of chips, and briefly mentioned remaps. While most chips are extremely basic (but overpriced) devices, the Uni-X has a large amount of computing power, which allows it to do things that are completely beyond the abilities of a standard rail chip. Unichip refer to the Uni-X as an additional ECU, rather than a chip. The first thing to keep in mind when considering a performance chip or remap, is that there are vast differences between their capabilities. What I will do is summarise what I like about the Unichip and why I prefer it to the alternatives, most notably a rail chip or remap. The original Q4 installation article is quite comprehensive, so I won't repeat all of that information here.
Install oil catch can with offset braket upgrade#
In that time it has performed flawlessly, so when Dynomotive offered me a free upgrade to the new Uni-X, I had no hesitation in accepting. I had a Unichip Q4 installed in the 200 over four years ago.
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