|
basic 101 on L-jet FI
the fuel injectors supply fuel to the motor instead of a Carb
but the FI system needs to know when and how much fuel to inject
they get the "when" from the RPM signal from the motor
they get the How much from the sensors
the AFM (air flow meter) or Flapper valve measures the amount of air then sends a voltage back to the ECU this is used to adj. how long the injectors stay open or how much fuel is delivered to the motor
the other sensors will modify the injector signal to give the motor more or less fuel
Now if you have black smoke coming out of the tail pipe you have way more fuel then air.
But before you start jacking with anything look for the easy fix first.
Make sure every thing is hooked up right.
like some Air is bypassed by the Auxiliary Air valve even when the motor is warm
Just give every thing a real close look and don't start adj. stuff until its the last resort.
HTH
Davegt27
|