Instead, Plug-and-Play comes pre-tuned to your crate engine, but still does require the use of a laptop computer to make the few necessary adjustments on initial startup, such as base timing, idle speed, and throttle position. Since Plug-and-Play is pre-calibrated, there is no need to complicate the installation with myriad calibration tables. With Plug-and-Play there are only six screens available to the end user. The Standard software has access to 40 calibration tables, while the Pro version grants entry to 100 screens along with advanced data-logging and other features. Since the introduction of Sequential Electronic Fuel Injection (SEFI) in 1986, fuel-injection has been fitted across the board on Mustangs, both base models and V-8. The only difference in the software is the number of calibration screens that can be accessed. Besides Plug-and-Play, ACCEL markets two levels of CalMap software: Standard and Pro. The internal workings of the Plug-and-Play ECM are the same as those of the universal non-calibrated kits, but it does use an application-specific version of the CalMap software. The ECM controls the injectors by pulse width, the time the injector sprays fuel into the port. Most of today's engines have sequential fuel injection systems. This is, however, determined by flow rate of the injector and. Because of the frequency of the firing of the injectors, a sequential injector normally has twice the duration, or opening time, of a simultaneous pulse. In the case of a Jaguar V12 the injectors are fired in 4 groups of 3 injectors. This system is more efficient than a multiport system because changes to the fuel mixture are instantaneous. The fuel is delivered to each bank alternately. Making It WorkThe Plug-and-Play system uses the same ACCEL/DFI Generation 7.0+ ECM found in the company's universal fuel-injection controller kits. Sequential fuel injection systems fire each injector individually.
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