Quick Fuel Technology Qfi Electronic Fuel Injection System - Manual (Page 18)

18
PHASE III: Final steps of the mechanical and electrical components installation
At this point, the mechanical components are installed, and the electrical connections into the vehicle’s
electrical system have been made. Now, you will take the steps needed to connect the mechanical and
electrical components to the battery.
Step 1: Assure proper grounding of the electrical system

Be certain the battery is in good condition, and is fully charged

Connect the GROUND CABLE to the battery. This is a VERY IMPORTANT issue
o To function correctly, the electrical circuit must be complete back to the battery. A poor
grounding circuit will choke the power/hot side of the
circuit, resulting in poor performance. In many cases, lack
of attention to the ground side of an electrical system
causes many automotive electrical problems.
o The ground cable from the battery must be in good
condition and attached to the engine block and the
vehicle’s chassis
o There must be auxiliary braided ground straps between
the vehicle’s engine and chassis. If these are broken or
missing, they can be obtained at any automotive parts
store.
o This is especially critical for a computer controlled fuel injection system
Step 2:
Reconnect red (HOT) battery cable to the battery’s positive terminal

THIS MUST BE DONE AFTER INSTALLING THE GROUND CABLE

As with the ground cable, the red, positive cable must be in good condition. Replace if needed.

The red (hot) cable is the lifeline of the entire electrical system
Step 3:
Turn ignition key to the ON position.

Check for fuel pump operation

Check for possible leaks from the fuel tank to the pressure
regulator, repair any leaks
o Check fuel pressure at regulator
o Should be 42-45 psi (290-310 kPa)