Table of Contents
Advertisement
11.12 Oil Pressure Switch
On engines with a single-wire oil pressure switch, connect the ORANGE/RED wire to the single oil pressure switch wire. This
will not allow the engine speed to go above 2500 RPM in the event of an oil pressure problem. The vehicle can be moved slowly
to a safe location.
NOTE:
This feature will not work with vehicles equipped with an oil pressure gauge. An oil pressure switch can be
purchased and installed in the oil circuit should the user desire this feature.
12.0 MECHANICAL CHECKOUT BEFORE STARTING ENGINE
Before starting engine, review and check off the following items:
Are electrical connections correct?
Are all fuel lines hooked up and correct?
Is throttle linkage hooked up?
Have fuel lines been leak checked?
Are all vacuum hoses connected?
Are all sensors installed and hooked up properly?
1 - Reconnect the battery.
2 - Install fuse in the fuse holder on the wiring harness. Before attempting to start the engine, perform the following to ensure
that the system is properly connected:
3 - While listening carefully, turn the key to the RUN position. The fuel pump will turn on and run for a few seconds before
being shut off by the ECU. This shutoff occurs when the key is in the run position and the ECU does not receive any
engine speed signal. At the first startup of the system after installation when the fuel system is dry, the fuel pump may
need to run longer than a few seconds. This may require additional cranking time to get fuel to the fuel injectors. A fuel
pressure gauge in the fuel supply line is an excellent way to tell whether the system is getting fuel. DO NOT crank the
engine for more than 15 seconds at a time and always allow adequate starter cool-down time between cranking.
4 - Make sure that there is no leakage from any fuel lines when the fuel system has been pressurized. With the air cleaner
removed, activate the throttle control to wide open once while listening for injector operation. The injectors will buzz
momentarily and fuel will spray from all 8 injectors.
5 - Ensure that all vacuum and port connections have been plugged or made. Now install the air cleaner.
DANGER!
MOVE THE THROTTLE INTO LINKAGE INTO WIDE OPEN CONDITION AND CHECK THAT IT DOES NOT
INTERFERE WITH AIR CLEANER OR OTHER COMPONENTS OF THE ENGINE AND MAKE SURE THAT IT
RETURNS FREELY TO IDLE CONDITION WHEN RELEASED. THROTTLE RETURN ACTION CAN BE
ENHANCED BY ADDING ADDITIONAL SPRINGS THAT PULL THE THROTTLE INTO CLOSED CONDITIONS.
FAILURE OF TESTING THROTTLE ACTUATION PERFORMANCE MAY CAUSE UNSAFE DRIVING
CONDITIONS, WHICH COULD CAUSE SERIOUS INJURY OR DEATH.
6 - Use the software to monitor some of the system parameters prior to engine startup. The monitor feature can find and
correct many potential installation problems before starting the engine. For first time users, you may need to read section
14.0 for a description of the MPI PRO-JECTION system software. Turn the ignition on and connect the PC to the MPI
PRO-JECTION wiring harness. Change to the monitor screen and monitor the data as shown in figure 4. The Mode
should be shown as idle. As the throttle is slowly opened, the mode should change from idle to run to full and wide open
throttle. The TPS should be reading 29-31 at closed throttle conditions. If the TPS is not in this range, the user must
adjust the TPS as outlined in section 18.3. However, the user should be aware this value will probably change and will
have to be readjusted after the final idle stop settings have been made in section 14.6 paragraph 7. Check the MAP
sensor readings without the engine running. Read section 18.2 for a description of the MAP sensor readings. Both the air
temperature and the engine temperature should be checked and should be very close to ambient temperatures. The
battery voltage should reflect the actual battery voltage or 12.5-13.5 volts. If any of these parameters or other parameters
are not reading properly, the installation should be double checked for that particular sensor. Refer to the troubleshooting
help in section 17.0 for additional assistance.
13.0 PRO-JECTION SYSTEM TUNING THEORY AND PHILOSOPHY
13.1 Tuning Goals
The purpose of the Tuning Goals section of this manual is not to give step by step details on how the actual tuning process
15
Advertisement
Table of Contents
Troubleshooting
