The up to date Sequential Electronic Fuel Injection Control System is made of sensors which observe the actual engine requirements, the Powertrain Control Module (PCM) which operates the particular system primarily based on return signals from these electrical feedback sensors, as well as actuators which are powered under the control of the actual ECM.

The ECU (Engine Computer) carries out activities such as fuel injection control, idle air control, and spark ignition control.

In addition, the Powertrain Control Module is loaded with many different diagnostic test settings which usually streamline trouble shooting any time a new trouble code appears.

The two most common calibraion tables that you need to manipulate or modify is undoubtedly the timing map and as well fuel map

Ignition timing control

The ignition power transistor placed located in the ignition main circuit turns ON and OFF in order to regulate the main current rate to the ignition coil. This controls the ignition timing so that it will generate the optimal ignition timing with regard to the engine performing conditions. The actual ignition timing is determined by the ECM (aka The Blackbox) as a result of rotational speed, air flow, engine coolant temperature (ECT), and atmospheric pressure.

Injector control

The injector open milliseconds (MS) as well as injection timing remain controlled so that the perfect air to fuel mixture is delivered to the engine to correspond to the continually-changing engine operating conditions. A correctly scaled injector is mounted in the intake port of each cylinder. Petrol is sent while under pressure (around 55 psi) coming from the gasoline tank to the actual fuel injectors through the fuel pump motor, with the actual pressure being regulated by the fuel pressure regulater at around 55 psi. The controlled fuel is then distributed evenly to each one of the injectors. Sequential fuel injection is usually performed one time for every cylinder per two rotations of the crankshaft. On a four cylindr engine the firing order will be 1-3-4-2. Each cylinder has a dedicated gasoline injector. This is known as multiport injection. The ECM (Engine Computer) provides a richer air/fuel mixture by carrying out “open-loop” control when the engine is cold or operating under high load conditions in order to maintain engine performance.In addition, when the engine is under normal operating temperature after warming-up, the ECM manages the air/fuel mixture using the heated Lambda sensor signal to handle “closed-loop” control. The closed-loop feedback accomplishes the theoretical Air-fuel mixture ratio where the catalytic converter can obtain the absolute maximum clean-up operation.

Using the Unichip Q-plus you will have total control over these variables to make alterations to the timing and fuel calibrations. The Unichip PnP has 24 RPM sites between 100 RPM and 24000 RPM and 13 load sites between closed throttle full throttle position. This equates to 312 available tuning points for each map. In turn the Unichip PnP is going to interpolate in between each speed and load site 16 times which gives a decent resolution densed map.

UniQ is Unichips most recently released software package for tuning engine ECU’s. This software program is a revolutionary change from old style DOS model which had been in operation for over a decade. Take the Unichip Tuning software for a test drive and see for youself.

Free Unichip Tuning Software downloads at Unichipwholesale.