SMART TUNER SMT8-L - INJECTOR PWM APPLICATION
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Perfect Power Application Notes. |
Application Note - AN 1 |
Injector/PWM Interception Method
The most common form of this is an injector signal (I would hope every car has this), but there are other forms such as a boost control solenoid signal, ignition signal or the continuous VANO/VVT signals.
Wiring
The following diagram is for high impedance applications :

The following diagram uses the Perfect Power inverter module's on-board driver to drive low impedance signals :

The SMT8-L uses the same wiring for PWM and frequency modifications. For PWM modifications the following picture shows which check box to tick in the System Definition (Shift F2) and which is the tuning map (F5)
Possible Applications
- Fueling modification in older management systems that only had one injector driver output and an on-board MAP sensor like the Bosch L3 JETRONIC system.
- Could modify VVT and continuous Vanos oil solenoid signals.
- Fuel trimming on a single injector or set of injectors in batch sequential fueling applications.
BOOST CONTROL SIGNAL MODIFICATION. NOT TO BE MIXED WITH BOOST CONTROL, WHERE THE SIGNAL IS CONTROLLED COMPLETELY BY THE SMT8-L.