Excelsior-HENDERSON HCX 1999, Service Handbook

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6999-0003 7/15/99
ENGINE CONTROL SYSTEM
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INSPECT INTAKE COLLARS
Inspect the intake collars and fasteners? Are the intake
collars fastened securely to the cylinder heads?
• Yes - Continue.
• No - Tighten the intake collar screws as needed.
INSPECT THROTTLE BODY
Remove the air cleaner cover and inspect the air cleaner.
Clean or replace the air cleaner if necessary
Open the throttle bore and inspect the butterfly valve, the
injectors, and the rear intake collar seal for damage or air
leaks. Are repairs needed?
• Yes - Make repairs. Reset closed throttle position, long term
fuel trim, and IACV adaption values. Clear the fault codes
and run the engine.
• No - Continue.
Remove the throttle body assembly. Inspect for air leaks
around the butterfly valve, the idle air control, and around the
throttle body seal. Are repairs needed?
• Yes - Make repairs. Reset closed throttle position, long term
fuel trim, and IACV adaption. Clear the fault codes and run
the engine. If the fault reoccurs, continue.
• No - Continue.
MEASURE FUEL PRESSURE
Connect a pressure gauge to the Schrader valve on the fuel
rail. Run the fuel pump and measure the fuel pressure. Is the
value in range?
Standard: 45 - 51 psi
• Yes - Inspect fuel hose for blockage. If none is found,
replace the fuel pump. Clear the fault codes and run the
engine. If the fault reoccurs, continue.
• No - Continue.