The EZ-EFI Multiport Retro-Fit kit is offered to bring all the benefits of Fast's award winning EZ-EFI system to multi-port fuel injected engines.  The kit includes:

Self tuning ECU
Wideband oxygen sensor (with fitting and plug)
Handheld user interface
Tach adapter
Multi-Port wiring harness 

The wiring harness is completely pre-wired and labeled for a simple installation.  It includes connectors for early style GM sensors (coolant temp, air temp, TPS, MAP and IAC) such as those found on a GM Tuned Port engine.

The harness is wired for eight traditional EV1 (Minitimer) style injectors.  Injector adapters are available to adapt the harness to newer “USCAR” style injectors.  The EZ-EFI system must be used with high impedance injectors.

The EZ-EFI system must be used with a vacuum referenced fuel pressure regulator.  Returnless fuel systems can not be used.  FAST offers an adjustable regulator that is ideally suited for use with EZ-EFI.  Various fuel system kits are available, one in particular is designed specifically for the EZ-EFI system.  It includes the fuel pump, EFI pressure regulator, filter, and a fuel pressure gauge.  Also included is a fuel pump relay harness. 

Related parts That must be added to the EZ port injected system are:

307003          Coolant Temp Sensor
307004          Air Temp Sensor
307007          Manifold pressure sensor – GM 1 Bar

Notes about all Fast EZ systems:

* They must use high impedance injectors.
* They do not support alternative fuels such as E85 or Methanol
* They do not work with forced induction
* They must be used with a high pressure fuel system (>=43 PSI) that return fuel to the tank
* The injectors fire in the bank-to-bank mode (all systems that do not require a cam signal do this)
* The system requires a good tach signal, such as would be available from an MSD 6AL
* This system must be paired with a throttle body such as the 30-7603
* A typical installation would include coolant and air temp sensors, and a 1 bar map sensor.