Fuel Injection System
8.18
Fichtâ Fuel Injection System -- Action Steps
W ARNING
Gasoline is highly flammable and explosive under certain conditions.
¨ Always exercise extreme caution whenever handling gasoline.
¨ Always refuel with the engine stopped and outdoors or in a well ventilated area.
¨ Do not smoke or allow open flames or sparks in or near the area where refueling is performed or where
gasoline is stored.
¨ Do not over fill the tank. (Do not fill the tank neck.)
¨ If you get gasoline on your skin or clothing, immediately wash it off with soap and water and change clothing.
¨ Never start the engine or let it run in an enclosed area. Gasoline powered engine exhaust fumes are
poisonous and can cause loss of consciousness and death in a short time.
W ARNING
The DIt ignition system presents a serious shock hazard. The primary circuit operates at 300 volts; the
secondary circuit operates in excess of 35,000 volts. Use caution to avoid injury from shock, or injury
from your reaction to shock. Do not handle primary or secondary ignition components while the engine
is cranking or running.
Fichtâ Fuel Injection System -- Action Steps -- Fuel System / Fuel Injectors
W ARNING
Fuel system may be under pressure and could spray fuel when Schrader valve is installed, gauge is at-
tached in fuel line, or when fuel line is removed from an injector.
If fault is suspected with the fuel pump, follow these steps:
1. Verify that fresh fuel is in the fuel tank. Oxygenated fuel with an octane rating of 89 is recommended for use in
DIt models.
2. Remove any foreign material and/or water from the fuel system.
3. Verify that the fuel lines are correctly installed on the fuel pump and individual fuel injectors. Refer to Chapter4
for further information.
4. Verify that there is between 20 and 30 psi of fuel pressure on the RETURN fuel line. To check:
A. Connect a 100 psi (690 kPa) gauge to pres--
sure tap on Schrader valve.
B. Connect tether cord to stop switch.
C. Crank engine, Results should be immediate.
If engine starts, shut off within 15 seconds.
Results:
S 20-30 psi (138-207 kPa) - OK.
S Low or no pressure - suspect air in fuel line
or damaged fuel pump. Check for air leaks.
Test fuel pump. Replace fuel pump if neces-
sary.
S Excessive pressure - fuel return line.
S Pump won’t run. Check fuel pump circuit.
NOTE: Cranking or running engine should show the same results. Fuel pressure is the same if using diagnostic
software.
Schrader V alve
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