How can I improve the fuel mixture of my EFi?
Advice applies to Hot Wire, Flapper and Gems Injection systems (regardless of how much you spent on other expensive bits) and is critical in order to gain even adequate engine performance and economy. The CO & HC emission test/set up that you may have had carried out for your MOT or Service can be quite misleading. The reason for this is that they are generally only tested at idle or low rpm. When tested at idle this has very little reference to your actual fuel mixture. When driving on all Efi systems the engine is normally set up to run at what can only be called a ‘compromise’ and with all injection systems, many easy gains can be realized with taking control of the basic fuelling procedures, On the Hot Wire System this is mostly taken care of by re-mapping the ECU and using either the Tornado or Optimax chip, this alone would ensure both idle, part throttle and power fuelling where all correct and large gains in engine economy, torque, and power would be instantly realized. On the
