Whats the difference between analogue and digital tuning units?
The analogue unit has no electronics inside and no processor, its generally made of resistors inside a plastic box with a screw to increase or decrease fuelling, these are very cheap to make and are usually found on auction sites, an issue with these units is that they have no set program to deliver the increased fuel at specific points, instead they just increase fuelling continuously even at idle which can cause the engine to run erratically and over time can belikely cause damage and are assoiciated with a lot of smoke from the exhaust. This is a real danger on the newest vehicles fitted with diesel particulate filters on the exhaust because if the filter becomes blocked and cannot be regenerated you will have to replace it at great cost. The analogue units generally will not work on quite a large number of modern cars due to the latest intelligent computers running the engine which can detect them and will cause the engine warning lamp to come on and the engine to go into safe mode
