Before You Buy
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The hidden dangers of diesel tuning and remapping. A few things to consider before purchasing a remap.

The problem is, you can easily go online and buy yourself a relatively cheap tuning and remapping programmer that will both read and write the file in your engine management system, which means if you had the means and know how to edit it, you could alter the way the engine runs. This is where the problems have started to arise as not only can you buy the hardware, you can also buy files on a CD that claim to offer the same as the professionals do. These CD's often have some 10,000 modified ECU's files on them, and all for only £4. Does that sound like a professional has made them to you?
Generally speaking, these files have been stolen from one or another company over the years and been compiled onto CD/DVD. Are the files good? Nobody knows... will they kill your engine? Well, we sure wont be finding out as we wouldn't dare use one on your expensive engine, but sadly lots of these people have done just that and the manufacturers are selling ECU's, engine's and transmissions like hot cakes as a result!
We feel it was worth writing this page to make you aware that the reason for the sudden drop in market price of this product is due to the amount of companies that have suddenly popped up claiming to be experts at remapping engine management systems! It is usually quite easy to spot them, just start asking some searching questions about how the maps work and you will soon find out if you are talking to a man who knows a little bit about computers and will change the file in your ecu for one he found on a CD he purchased from some online shop, or if your talking to an industry professional who has been doing this successfully all his life and actually calibrates the file for your particular car and as a result can tweak it to perfection and ensure all security and chassis coding is retained.
Some so called "calibrators" couldn't even tell you the correct AFR for full load use, let alone how a torque limiting map actually works and why you should just maximise all values within it... why these people think its acceptable to just increase calibration tables to max without knowing what they do just because they read it on the internet is anyones guess, but every industry is the same really, if people can make an easy buck, they will and its always at the end users cost.
At the end of the day, this is a high technology industry that requires constant re-investment in tooling and skills due to the sheer pace of the technology utilised on modern vehicles. Anyone diesel tuning or remapping at O. E. level as we are needs to be constantly retraining and have access to the best tooling and software available.

It is also prudent to ensure you are getting good backup and after sales support. Simple things such as:
  • 7 day no quibble trial period so you can test in your own time.
  • Lifetime warranty on the product against corruption or other defect.
  • Easy access to your original calibration file if you need it.
  • Power and torque improvement guaranteed.
  • Fuel economy improvements guaranteed if turbo diesel powered.
  • Vat registered file supplier. 
  • (No busy file supplier could stay under the tiny £54K PA vat turnover threshold)

Finally, your installer should be able to give you the telephone number of the actual file calibrator if it isn't himself. That way you can call him and get some information as to their credentials. Please take care out there... don't be the next customer whom comes to us to get their ECU working again after someone has damaged it with cheap tools and diesel tuning inexperience.
Remember, tools are cheap and can be easily and quickly bought, but knowledge is invaluable and takes hard work and time to attain.
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